Chicago Zone 01, IL — rate center
- State
- Illinois
- Active prefixes
- 915
- Carriers
- 46
- Pooled prefixes
- 463
- LATA
- 358
- Metro area
- Chicago-Naperville-Elgin, IL-IN MSA
Phone numbers "from Chicago Zone 01" are, precisely speaking, numbers whose prefixes are anchored to the Chicago Zone 01 rate center of Illinois, under 312, 630, 708, 773, 847, 872.
The rate center currently carries 915 working prefixes across 46 carriers. 463 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Chicago-Naperville-Elgin, IL-IN Metropolitan Statistical Area. Routing-wise it sits in LATA 358.
Multiple area codes over one rate center (312/630/708/773/847/872) is the overlay pattern: same geography, different first three digits.
At 915 prefixes — a ceiling of 9,150,000 numbers — Chicago Zone 01 is one of Illinois's heavyweight rate centers.
A Chicago Zone 01 prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Chicago Zone 01
Showing 747 of 747
| Prefix | Code holder | Pooled |
|---|---|---|
| 312-200 | METROPCS, INC. | Yes |
| 312-201 | ILLINOIS BELL TEL CO | No |
| 312-202 | ILLINOIS BELL TEL CO | Yes |
| 312-203 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-204 | ILLINOIS BELL TEL CO | Yes |
| 312-205 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-206 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-207 | ILLINOIS BELL TEL CO | Yes |
| 312-208 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-210 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-212 | ILLINOIS BELL TEL CO | Yes |
| 312-213 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-214 | ILLINOIS BELL TEL CO | No |
| 312-216 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-217 | T-MOBILE USA, INC. | Yes |
| 312-218 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-219 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-220 | ILLINOIS BELL TEL CO | No |
| 312-221 | T-MOBILE USA, INC. | Yes |
| 312-222 | ILLINOIS BELL TEL CO | No |
| 312-223 | ILLINOIS BELL TEL CO | No |
| 312-224 | LEVEL 3 COMMUNICATIONS, LLC - IL | No |
| 312-225 | ILLINOIS BELL TEL CO | No |
| 312-226 | ILLINOIS BELL TEL CO | No |
| 312-227 | ILLINOIS BELL TEL CO | Yes |
| 312-228 | ILLINOIS BELL TEL CO | No |
| 312-229 | ILLINOIS BELL TEL CO | Yes |
| 312-230 | ILLINOIS BELL TEL CO | Yes |
| 312-232 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-233 | ILLINOIS BELL TEL CO | Yes |
| 312-234 | ILLINOIS BELL TEL CO | Yes |
| 312-235 | ILLINOIS BELL TEL CO | Yes |
| 312-236 | ILLINOIS BELL TEL CO | No |
| 312-237 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-238 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-239 | AT&T - LOCAL | Yes |
| 312-240 | ILLINOIS BELL TEL CO | No |
| 312-241 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-242 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-243 | ILLINOIS BELL TEL CO | No |
| 312-244 | ILLINOIS BELL TEL CO | Yes |
| 312-245 | ILLINOIS BELL TEL CO | No |
| 312-247 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-248 | METROPCS, INC. | Yes |
| 312-249 | SPOK, INC. | No |
| 312-250 | SPOK, INC. | No |
| 312-251 | ILLINOIS BELL TEL CO | No |
| 312-252 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-255 | ILLINOIS BELL TEL CO | Yes |
| 312-256 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-257 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-258 | ILLINOIS BELL TEL CO | No |
| 312-259 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-260 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-261 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-262 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-263 | ILLINOIS BELL TEL CO | No |
| 312-264 | LEVEL 3 COMMUNICATIONS, LLC - IL | No |
| 312-265 | ACCESS ONE, INC. - IL | Yes |
| 312-266 | ILLINOIS BELL TEL CO | No |
| 312-267 | ILLINOIS BELL TEL CO | Yes |
| 312-268 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-269 | ILLINOIS BELL TEL CO | No |
| 312-270 | METROPCS, INC. | Yes |
| 312-271 | SPOK, INC. | No |
| 312-272 | SPOK, INC. | No |
| 312-273 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-274 | ILLINOIS BELL TEL CO | No |
| 312-275 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-276 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-277 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-278 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-280 | ILLINOIS BELL TEL CO | No |
| 312-281 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-282 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-283 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-284 | XO ILLINOIS, INC. | Yes |
| 312-285 | T-MOBILE USA, INC. | Yes |
| 312-286 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-288 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-289 | SPOK, INC. | No |
| 312-290 | SPOK, INC. | No |
| 312-291 | ILLINOIS BELL TEL CO | Yes |
| 312-292 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-293 | ILLINOIS BELL TEL CO | No |
| 312-294 | ILLINOIS BELL TEL CO | No |
| 312-296 | T-MOBILE USA, INC. | Yes |
| 312-297 | ILLINOIS BELL TEL CO | No |
| 312-298 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-299 | SPOK, INC. | No |
| 312-300 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-302 | ILLINOIS BELL TEL CO | No |
| 312-306 | ILLINOIS BELL TEL CO | No |
| 312-307 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-308 | ILLINOIS BELL TEL CO | No |
| 312-309 | ILLINOIS BELL TEL CO | No |
| 312-312 | ONVOY, LLC | Yes |
| 312-313 | ONVOY, LLC | Yes |
| 312-315 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-316 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-319 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-320 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-321 | ILLINOIS BELL TEL CO | No |
| 312-322 | ILLINOIS BELL TEL CO | No |
| 312-323 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-324 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-325 | ILLINOIS BELL TEL CO | Yes |
| 312-326 | ILLINOIS BELL TEL CO | No |
| 312-327 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-328 | ILLINOIS BELL TEL CO | No |
| 312-329 | ILLINOIS BELL TEL CO | No |
| 312-330 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-332 | ILLINOIS BELL TEL CO | No |
| 312-333 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-334 | FIRST COMMUNICATIONS, LLC | No |
| 312-335 | ILLINOIS BELL TEL CO | No |
| 312-336 | ILLINOIS BELL TEL CO | No |
| 312-337 | ILLINOIS BELL TEL CO | No |
| 312-338 | ILLINOIS BELL TEL CO | No |
| 312-339 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-340 | T-MOBILE USA, INC. | Yes |
| 312-341 | ILLINOIS BELL TEL CO | No |
| 312-342 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-343 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-344 | ILLINOIS BELL TEL CO | Yes |
| 312-345 | ILLINOIS BELL TEL CO | No |
| 312-346 | ILLINOIS BELL TEL CO | No |
| 312-347 | ILLINOIS BELL TEL CO | No |
| 312-348 | ONVOY, LLC | Yes |
| 312-349 | SPOK, INC. | No |
| 312-350 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-351 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-353 | ILLINOIS BELL TEL CO | No |
| 312-355 | ILLINOIS BELL TEL CO | No |
| 312-356 | ILLINOIS BELL TEL CO | No |
| 312-357 | ILLINOIS BELL TEL CO | No |
| 312-358 | T-MOBILE USA, INC. | Yes |
| 312-359 | SPOK, INC. | No |
| 312-360 | ILLINOIS BELL TEL CO | No |
| 312-361 | ILLINOIS BELL TEL CO | Yes |
| 312-362 | ILLINOIS BELL TEL CO | No |
| 312-363 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-364 | ILLINOIS BELL TEL CO | No |
| 312-365 | SPOK, INC. | No |
| 312-366 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-368 | ILLINOIS BELL TEL CO | No |
| 312-369 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-370 | SPOK, INC. | No |
| 312-371 | T-MOBILE USA, INC. | Yes |
| 312-372 | ILLINOIS BELL TEL CO | No |
| 312-373 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-374 | ILLINOIS BELL TEL CO | Yes |
| 312-375 | T-MOBILE USA, INC. | No |
| 312-376 | ONVOY, LLC | Yes |
| 312-377 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-378 | SPOK, INC. | No |
| 312-379 | PAETEC ITEL, LLC | Yes |
| 312-380 | ILLINOIS BELL TEL CO | Yes |
| 312-381 | ILLINOIS BELL TEL CO | Yes |
| 312-382 | ILLINOIS BELL TEL CO | No |
| 312-383 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-384 | ILLINOIS BELL TEL CO | Yes |
| 312-385 | ILLINOIS BELL TEL CO | Yes |
| 312-386 | ILLINOIS BELL TEL CO | Yes |
| 312-387 | SPOK, INC. | No |
| 312-388 | T-MOBILE USA, INC. | Yes |
| 312-389 | SPOK, INC. | No |
| 312-390 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-391 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-392 | ONVOY, LLC | Yes |
| 312-393 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-394 | ILLINOIS BELL TEL CO | Yes |
| 312-395 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-396 | ILLINOIS BELL TEL CO | No |
| 312-397 | ILLINOIS BELL TEL CO | No |
| 312-398 | SPOK, INC. | No |
| 312-399 | T-MOBILE USA, INC. | Yes |
| 312-400 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-401 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-402 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-404 | T-MOBILE USA, INC. | No |
| 312-405 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-407 | ILLINOIS BELL TEL CO | No |
| 312-408 | ILLINOIS BELL TEL CO | No |
| 312-409 | ILLINOIS BELL TEL CO | Yes |
| 312-410 | ILLINOIS BELL TEL CO | No |
| 312-413 | ILLINOIS BELL TEL CO | No |
| 312-414 | VONAGE AMERICA LLC | Yes |
| 312-415 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-416 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | No |
| 312-417 | ILLINOIS BELL TEL CO | No |
| 312-418 | SPOK, INC. | No |
| 312-419 | ILLINOIS BELL TEL CO | No |
| 312-420 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-421 | ILLINOIS BELL TEL CO | No |
| 312-422 | ILLINOIS BELL TEL CO | No |
| 312-423 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-424 | ILLINOIS BELL TEL CO | No |
| 312-425 | ILLINOIS BELL TEL CO | No |
| 312-426 | ONVOY, LLC | Yes |
| 312-427 | ILLINOIS BELL TEL CO | No |
| 312-428 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-429 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-430 | ILLINOIS BELL TEL CO | No |
| 312-431 | ILLINOIS BELL TEL CO | No |
| 312-432 | ILLINOIS BELL TEL CO | No |
| 312-433 | ILLINOIS BELL TEL CO | Yes |
| 312-434 | T-MOBILE USA, INC. | Yes |
| 312-435 | ILLINOIS BELL TEL CO | No |
| 312-436 | ILLINOIS BELL TEL CO | Yes |
| 312-437 | T-MOBILE USA, INC. | Yes |
| 312-438 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-439 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-440 | ILLINOIS BELL TEL CO | No |
| 312-441 | ILLINOIS BELL TEL CO | No |
| 312-442 | ILLINOIS BELL TEL CO | Yes |
| 312-443 | ILLINOIS BELL TEL CO | Yes |
| 312-444 | ILLINOIS BELL TEL CO | Yes |
| 312-445 | ILLINOIS BELL TEL CO | Yes |
| 312-446 | T-MOBILE USA, INC. | Yes |
| 312-447 | ILLINOIS BELL TEL CO | Yes |
| 312-448 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-449 | WAVENATION, LLC | Yes |
| 312-450 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-451 | T-MOBILE USA, INC. | Yes |
| 312-452 | ONVOY SPECTRUM, LLC | Yes |
| 312-453 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | No |
| 312-454 | ILLINOIS BELL TEL CO | No |
| 312-455 | ILLINOIS BELL TEL CO | No |
| 312-456 | ILLINOIS BELL TEL CO | No |
| 312-457 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-458 | ILLINOIS BELL TEL CO | Yes |
| 312-459 | T-MOBILE USA, INC. | Yes |
| 312-460 | ILLINOIS BELL TEL CO | Yes |
| 312-461 | ILLINOIS BELL TEL CO | No |
| 312-462 | ILLINOIS BELL TEL CO | Yes |
| 312-463 | ILLINOIS BELL TEL CO | Yes |
| 312-464 | ILLINOIS BELL TEL CO | No |
| 312-465 | PAETEC ITEL, LLC | Yes |
| 312-466 | ILLINOIS BELL TEL CO | No |
| 312-467 | ILLINOIS BELL TEL CO | No |
| 312-468 | T-MOBILE USA, INC. | Yes |
| 312-469 | ILLINOIS BELL TEL CO | Yes |
| 312-470 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-471 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-472 | ILLINOIS BELL TEL CO | Yes |
| 312-473 | ONVOY, LLC | Yes |
| 312-474 | ILLINOIS BELL TEL CO | No |
| 312-475 | ILLINOIS BELL TEL CO | No |
| 312-476 | T-MOBILE USA, INC. | Yes |
| 312-477 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-478 | T-MOBILE USA, INC. | Yes |
| 312-479 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-480 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-481 | METROPCS, INC. | Yes |
| 312-482 | ILLINOIS BELL TEL CO | No |
| 312-483 | T-MOBILE USA, INC. | Yes |
| 312-484 | SPOK, INC. | No |
| 312-485 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-486 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-487 | METROPCS, INC. | Yes |
| 312-488 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-489 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-490 | SPOK, INC. | No |
| 312-491 | ILLINOIS BELL TEL CO | No |
| 312-492 | ILLINOIS BELL TEL CO | Yes |
| 312-493 | T-MOBILE USA, INC. | No |
| 312-494 | ILLINOIS BELL TEL CO | No |
| 312-495 | SPOK, INC. | No |
| 312-496 | ILLINOIS BELL TEL CO | Yes |
| 312-497 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-498 | T-MOBILE USA, INC. | Yes |
| 312-499 | ILLINOIS BELL TEL CO | No |
| 312-500 | ONVOY, LLC | Yes |
| 312-502 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-503 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-504 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-505 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-506 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-507 | ILLINOIS BELL TEL CO | Yes |
| 312-508 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-509 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-512 | SPOK, INC. | No |
| 312-513 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-514 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-515 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-516 | ILLINOIS BELL TEL CO | No |
| 312-517 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-519 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-520 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-521 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-522 | T-MOBILE USA, INC. | Yes |
| 312-523 | T-MOBILE USA, INC. | Yes |
| 312-525 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-526 | ILLINOIS BELL TEL CO | Yes |
| 312-527 | ILLINOIS BELL TEL CO | No |
| 312-528 | ILLINOIS BELL TEL CO | Yes |
| 312-529 | AT&T - LOCAL | Yes |
| 312-530 | STRATUS NETWORKS | Yes |
| 312-532 | T-MOBILE USA, INC. | Yes |
| 312-533 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-534 | ILLINOIS BELL TEL CO | Yes |
| 312-535 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-536 | T-MOBILE USA, INC. | Yes |
| 312-537 | ILLINOIS BELL TEL CO | Yes |
| 312-538 | METROPCS, INC. | Yes |
| 312-539 | T-MOBILE USA, INC. | Yes |
| 312-540 | ILLINOIS BELL TEL CO | No |
| 312-541 | ILLINOIS BELL TEL CO | No |
| 312-542 | ILLINOIS BELL TEL CO | No |
| 312-543 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-544 | ILLINOIS BELL TEL CO | Yes |
| 312-545 | T-MOBILE USA, INC. | Yes |
| 312-546 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-547 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-548 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-549 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-550 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-551 | ILLINOIS BELL TEL CO | No |
| 312-552 | ILLINOIS BELL TEL CO | No |
| 312-553 | ILLINOIS BELL TEL CO | No |
| 312-554 | ILLINOIS BELL TEL CO | Yes |
| 312-556 | ILLINOIS BELL TEL CO | No |
| 312-557 | ILLINOIS BELL TEL CO | No |
| 312-558 | ILLINOIS BELL TEL CO | No |
| 312-559 | ILLINOIS BELL TEL CO | No |
| 312-560 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-561 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-562 | SPOK, INC. | No |
| 312-563 | ILLINOIS BELL TEL CO | No |
| 312-564 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-565 | ILLINOIS BELL TEL CO | No |
| 312-566 | ILLINOIS BELL TEL CO | Yes |
| 312-567 | ILLINOIS BELL TEL CO | No |
| 312-568 | ILLINOIS BELL TEL CO | Yes |
| 312-569 | ILLINOIS BELL TEL CO | Yes |
| 312-570 | ILLINOIS BELL TEL CO | No |
| 312-571 | SPOK, INC. | No |
| 312-572 | ILLINOIS BELL TEL CO | Yes |
| 312-573 | ILLINOIS BELL TEL CO | No |
| 312-574 | ILLINOIS BELL TEL CO | Yes |
| 312-575 | ILLINOIS BELL TEL CO | No |
| 312-576 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-577 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | No |
| 312-578 | ILLINOIS BELL TEL CO | No |
| 312-579 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-580 | ILLINOIS BELL TEL CO | No |
| 312-581 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-582 | ILLINOIS BELL TEL CO | Yes |
| 312-583 | ILLINOIS BELL TEL CO | Yes |
| 312-584 | VOIP INNOVATIONS, LLC | Yes |
| 312-585 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-586 | ONVOY, LLC | Yes |
| 312-587 | ILLINOIS BELL TEL CO | No |
| 312-588 | ILLINOIS BELL TEL CO | Yes |
| 312-589 | ILLINOIS BELL TEL CO | Yes |
| 312-590 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-591 | ILLINOIS BELL TEL CO | No |
| 312-592 | ILLINOIS BELL TEL CO | No |
| 312-593 | T-MOBILE USA, INC. | No |
| 312-594 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-595 | ILLINOIS BELL TEL CO | No |
| 312-596 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-597 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-598 | ONVOY, LLC | Yes |
| 312-599 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-600 | ONVOY, LLC | Yes |
| 312-601 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | No |
| 312-602 | LEVEL 3 COMMUNICATIONS, LLC - IL | No |
| 312-603 | ILLINOIS BELL TEL CO | No |
| 312-604 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-605 | PAETEC ITEL, LLC | Yes |
| 312-606 | ILLINOIS BELL TEL CO | No |
| 312-607 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-608 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-609 | ILLINOIS BELL TEL CO | Yes |
| 312-610 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-612 | ILLINOIS BELL TEL CO | Yes |
| 312-613 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-614 | ILLINOIS BELL TEL CO | Yes |
| 312-616 | ILLINOIS BELL TEL CO | No |
| 312-617 | T-MOBILE USA, INC. | Yes |
| 312-618 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-619 | T-MOBILE USA, INC. | Yes |
| 312-620 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-621 | ILLINOIS BELL TEL CO | No |
| 312-622 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-623 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-624 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-625 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-626 | ONVOY, LLC | Yes |
| 312-627 | ILLINOIS BELL TEL CO | Yes |
| 312-628 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-629 | ILLINOIS BELL TEL CO | No |
| 312-630 | ILLINOIS BELL TEL CO | No |
| 312-631 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 312-632 | ILLINOIS BELL TEL CO | Yes |
| 312-633 | ILLINOIS BELL TEL CO | No |
| 312-634 | ILLINOIS BELL TEL CO | No |
| 312-635 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-636 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-637 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-638 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-639 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-640 | ILLINOIS BELL TEL CO | No |
| 312-641 | ILLINOIS BELL TEL CO | No |
| 312-642 | ILLINOIS BELL TEL CO | No |
| 312-643 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | No |
| 312-644 | ILLINOIS BELL TEL CO | No |
| 312-645 | ILLINOIS BELL TEL CO | No |
| 312-646 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-647 | T-MOBILE USA, INC. | Yes |
| 312-648 | ILLINOIS BELL TEL CO | Yes |
| 312-649 | ILLINOIS BELL TEL CO | No |
| 312-650 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-651 | ILLINOIS BELL TEL CO | Yes |
| 312-652 | ILLINOIS BELL TEL CO | No |
| 312-653 | ILLINOIS BELL TEL CO | No |
| 312-654 | ILLINOIS BELL TEL CO | No |
| 312-655 | ILLINOIS BELL TEL CO | No |
| 312-656 | T-MOBILE USA, INC. | Yes |
| 312-657 | SPOK, INC. | No |
| 312-658 | ILLINOIS BELL TEL CO | No |
| 312-659 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-660 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-661 | ILLINOIS BELL TEL CO | Yes |
| 312-662 | ILLINOIS BELL TEL CO | Yes |
| 312-663 | ILLINOIS BELL TEL CO | No |
| 312-664 | ILLINOIS BELL TEL CO | No |
| 312-665 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-666 | ILLINOIS BELL TEL CO | No |
| 312-667 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-668 | CSC WIRELESS, LLC | Yes |
| 312-669 | ILLINOIS BELL TEL CO | Yes |
| 312-670 | ILLINOIS BELL TEL CO | No |
| 312-671 | T-MOBILE USA, INC. | Yes |
| 312-672 | ILLINOIS BELL TEL CO | Yes |
| 312-673 | FIRST COMMUNICATIONS, LLC | No |
| 312-674 | ILLINOIS BELL TEL CO | Yes |
| 312-675 | ILLINOIS BELL TEL CO | Yes |
| 312-676 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-677 | SPOK, INC. | No |
| 312-678 | T-MOBILE USA, INC. | Yes |
| 312-679 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 312-680 | ONVOY, LLC | Yes |
| 312-681 | ILLINOIS BELL TEL CO | Yes |
| 312-682 | NUSO, LLC | Yes |
| 312-683 | ILLINOIS BELL TEL CO | Yes |
| 312-684 | T-MOBILE USA, INC. | Yes |
| 312-685 | T-MOBILE USA, INC. | Yes |
| 312-686 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-687 | T-MOBILE USA, INC. | Yes |
| 312-688 | SPOK, INC. | No |
| 312-689 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-690 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-691 | INDIANA PAGING NETWORK, INC. | No |
| 312-692 | ILLINOIS BELL TEL CO | Yes |
| 312-693 | ILLINOIS BELL TEL CO | No |
| 312-694 | ILLINOIS BELL TEL CO | Yes |
| 312-695 | ILLINOIS BELL TEL CO | No |
| 312-696 | ILLINOIS BELL TEL CO | Yes |
| 312-697 | ILLINOIS BELL TEL CO | Yes |
| 312-698 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-701 | ILLINOIS BELL TEL CO | Yes |
| 312-702 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-703 | ILLINOIS BELL TEL CO | No |
| 312-704 | ILLINOIS BELL TEL CO | No |
| 312-705 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-706 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-707 | ILLINOIS BELL TEL CO | No |
| 312-708 | ONVOY SPECTRUM, LLC | Yes |
| 312-709 | T-MOBILE USA, INC. | Yes |
| 312-710 | ILLINOIS BELL TEL CO | No |
| 312-712 | ILLINOIS BELL TEL CO | No |
| 312-713 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-714 | ILLINOIS BELL TEL CO | Yes |
| 312-715 | ILLINOIS BELL TEL CO | Yes |
| 312-716 | ILLINOIS BELL TEL CO | No |
| 312-718 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-719 | T-MOBILE USA, INC. | Yes |
| 312-720 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-721 | T-MOBILE USA, INC. | Yes |
| 312-722 | PAETEC ITEL, LLC | Yes |
| 312-723 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-724 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-725 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-726 | ILLINOIS BELL TEL CO | No |
| 312-727 | ILLINOIS BELL TEL CO | No |
| 312-728 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-729 | ILLINOIS BELL TEL CO | No |
| 312-730 | AT&T - LOCAL | Yes |
| 312-731 | T-MOBILE USA, INC. | Yes |
| 312-732 | ILLINOIS BELL TEL CO | No |
| 312-733 | ILLINOIS BELL TEL CO | No |
| 312-734 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-736 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-737 | ILLINOIS BELL TEL CO | No |
| 312-738 | ILLINOIS BELL TEL CO | No |
| 312-739 | ILLINOIS BELL TEL CO | No |
| 312-740 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-741 | PAETEC ITEL, LLC | Yes |
| 312-742 | ILLINOIS BELL TEL CO | No |
| 312-743 | ILLINOIS BELL TEL CO | Yes |
| 312-744 | ILLINOIS BELL TEL CO | No |
| 312-745 | ILLINOIS BELL TEL CO | No |
| 312-746 | ILLINOIS BELL TEL CO | No |
| 312-747 | ILLINOIS BELL TEL CO | No |
| 312-748 | ONVOY, LLC | Yes |
| 312-750 | ILLINOIS BELL TEL CO | No |
| 312-751 | ILLINOIS BELL TEL CO | No |
| 312-752 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-753 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-754 | LEVEL 3 TELECOM OF ILLINOIS, LLC - IL | Yes |
| 312-755 | ILLINOIS BELL TEL CO | No |
| 312-756 | ILLINOIS BELL TEL CO | Yes |
| 312-757 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-758 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-759 | ILLINOIS BELL TEL CO | Yes |
| 312-760 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-761 | TELENGY LLC | Yes |
| 312-762 | ILLINOIS BELL TEL CO | No |
| 312-763 | COMCAST IP PHONE, LLC | Yes |
| 312-764 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-765 | ILLINOIS BELL TEL CO | Yes |
| 312-766 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-767 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-768 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-769 | INDIANA PAGING NETWORK, INC. | No |
| 312-770 | ILLINOIS BELL TEL CO | Yes |
| 312-771 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-772 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-773 | ONVOY SPECTRUM, LLC | Yes |
| 312-774 | T-MOBILE USA, INC. | Yes |
| 312-775 | ILLINOIS BELL TEL CO | Yes |
| 312-776 | T-MOBILE USA, INC. | Yes |
| 312-777 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-778 | ONVOY, LLC | Yes |
| 312-779 | ONVOY, LLC | Yes |
| 312-780 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Yes |
| 312-781 | ILLINOIS BELL TEL CO | No |
| 312-782 | ILLINOIS BELL TEL CO | No |
| 312-783 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-784 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-785 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-786 | ILLINOIS BELL TEL CO | No |
| 312-787 | ILLINOIS BELL TEL CO | No |
| 312-788 | ILLINOIS BELL TEL CO | Yes |
| 312-789 | ILLINOIS BELL TEL CO | Yes |
| 312-790 | ILLINOIS BELL TEL CO | No |
| 312-791 | ILLINOIS BELL TEL CO | Yes |
| 312-792 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-793 | ILLINOIS BELL TEL CO | No |
| 312-794 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-795 | ILLINOIS BELL TEL CO | No |
| 312-796 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-797 | ILLINOIS BELL TEL CO | No |
| 312-798 | ILLINOIS BELL TEL CO | Yes |
| 312-799 | ILLINOIS BELL TEL CO | Yes |
| 312-800 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-801 | NUSO, LLC | Yes |
| 312-802 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-803 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | No |
| 312-804 | T-MOBILE USA, INC. | No |
| 312-805 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-806 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-807 | ILLINOIS BELL TEL CO | No |
| 312-808 | ILLINOIS BELL TEL CO | No |
| 312-809 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-810 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-812 | ILLINOIS BELL TEL CO | No |
| 312-813 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-814 | ILLINOIS BELL TEL CO | No |
| 312-815 | AIRESPRING, INC. | Yes |
| 312-817 | ILLINOIS BELL TEL CO | No |
| 312-818 | T-MOBILE USA, INC. | Yes |
| 312-819 | ILLINOIS BELL TEL CO | No |
| 312-820 | ONVOY, LLC | Yes |
| 312-821 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Yes |
| 312-822 | ILLINOIS BELL TEL CO | No |
| 312-823 | ILLINOIS BELL TEL CO | Yes |
| 312-824 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-825 | T-MOBILE USA, INC. | Yes |
| 312-826 | T-MOBILE USA, INC. | Yes |
| 312-827 | ILLINOIS BELL TEL CO | No |
| 312-828 | ILLINOIS BELL TEL CO | No |
| 312-829 | ILLINOIS BELL TEL CO | No |
| 312-830 | SPOK, INC. | No |
| 312-831 | ILLINOIS BELL TEL CO | No |
| 312-832 | ILLINOIS BELL TEL CO | No |
| 312-833 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-834 | ILLINOIS BELL TEL CO | Yes |
| 312-835 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-836 | ILLINOIS BELL TEL CO | No |
| 312-837 | COMCAST IP PHONE, LLC | Yes |
| 312-838 | T-MOBILE USA, INC. | Yes |
| 312-839 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-840 | ILLINOIS BELL TEL CO | No |
| 312-841 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-842 | ILLINOIS BELL TEL CO | No |
| 312-843 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-845 | ILLINOIS BELL TEL CO | No |
| 312-846 | ILLINOIS BELL TEL CO | Yes |
| 312-847 | ONVOY, LLC | Yes |
| 312-848 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-849 | ILLINOIS BELL TEL CO | No |
| 312-850 | ILLINOIS BELL TEL CO | No |
| 312-851 | SPOK, INC. | No |
| 312-852 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-853 | ILLINOIS BELL TEL CO | No |
| 312-854 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | Yes |
| 312-855 | ILLINOIS BELL TEL CO | No |
| 312-856 | ILLINOIS BELL TEL CO | Yes |
| 312-857 | ILLINOIS BELL TEL CO | Yes |
| 312-858 | RCLEC, INC. | Yes |
| 312-859 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-860 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-861 | ILLINOIS BELL TEL CO | No |
| 312-862 | ILLINOIS BELL TEL CO | Yes |
| 312-863 | PAETEC ITEL, LLC | Yes |
| 312-864 | ILLINOIS BELL TEL CO | No |
| 312-866 | T-MOBILE USA, INC. | Yes |
| 312-867 | ILLINOIS BELL TEL CO | No |
| 312-868 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-869 | ILLINOIS BELL TEL CO | Yes |
| 312-870 | FIRST COMMUNICATIONS, LLC | Yes |
| 312-871 | T-MOBILE USA, INC. | Yes |
| 312-872 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-873 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | No |
| 312-874 | T-MOBILE USA, INC. | Yes |
| 312-875 | ILLINOIS BELL TEL CO | No |
| 312-876 | ILLINOIS BELL TEL CO | No |
| 312-877 | AT&T ENTERPRISES, LLC | Yes |
| 312-878 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-879 | ILLINOIS BELL TEL CO | Yes |
| 312-880 | ILLINOIS BELL TEL CO | Yes |
| 312-881 | PAETEC ITEL, LLC | Yes |
| 312-882 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-883 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-884 | PAETEC ITEL, LLC | Yes |
| 312-885 | T-MOBILE USA, INC. | Yes |
| 312-886 | ILLINOIS BELL TEL CO | No |
| 312-887 | ILLINOIS BELL TEL CO | Yes |
| 312-888 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-889 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-890 | T-MOBILE USA, INC. | Yes |
| 312-891 | SPOK, INC. | No |
| 312-892 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-893 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-894 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-895 | LEVEL 3 COMMUNICATIONS, LLC - IL | No |
| 312-896 | LEVEL 3 COMMUNICATIONS, LLC - IL | No |
| 312-897 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-898 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-899 | ILLINOIS BELL TEL CO | Yes |
| 312-900 | FRACTEL, LLC | Yes |
| 312-901 | SPOK, INC. | No |
| 312-902 | ILLINOIS BELL TEL CO | No |
| 312-903 | AMERICAN MESSAGING SERVICES, LLC | No |
| 312-904 | ILLINOIS BELL TEL CO | No |
| 312-905 | ILLINOIS BELL TEL CO | Yes |
| 312-906 | ILLINOIS BELL TEL CO | Yes |
| 312-907 | T-MOBILE USA, INC. | Yes |
| 312-908 | ILLINOIS BELL TEL CO | No |
| 312-909 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-910 | ONVOY, LLC | Yes |
| 312-912 | ILLINOIS BELL TEL CO | Yes |
| 312-913 | ILLINOIS BELL TEL CO | No |
| 312-914 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-915 | ILLINOIS BELL TEL CO | No |
| 312-917 | ILLINOIS BELL TEL CO | No |
| 312-918 | T-MOBILE USA, INC. | Yes |
| 312-919 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-920 | ILLINOIS BELL TEL CO | No |
| 312-921 | ILLINOIS BELL TEL CO | Yes |
| 312-922 | ILLINOIS BELL TEL CO | No |
| 312-923 | ILLINOIS BELL TEL CO | No |
| 312-924 | PAETEC ITEL, LLC | No |
| 312-925 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-926 | ILLINOIS BELL TEL CO | No |
| 312-927 | T-MOBILE USA, INC. | No |
| 312-928 | ILLINOIS BELL TEL CO | Yes |
| 312-929 | T-MOBILE USA, INC. | Yes |
| 312-930 | ILLINOIS BELL TEL CO | No |
| 312-931 | ILLINOIS BELL TEL CO | Yes |
| 312-932 | ILLINOIS BELL TEL CO | Yes |
| 312-933 | T-MOBILE USA, INC. | Yes |
| 312-934 | T-MOBILE USA, INC. | Yes |
| 312-935 | ILLINOIS BELL TEL CO | No |
| 312-936 | ILLINOIS BELL TEL CO | No |
| 312-937 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Yes |
| 312-938 | ILLINOIS BELL TEL CO | No |
| 312-939 | ILLINOIS BELL TEL CO | No |
| 312-940 | PEERLESS NETWORK OF ILLINOIS, LLC - IL | Yes |
| 312-941 | SPOK, INC. | No |
| 312-942 | ILLINOIS BELL TEL CO | No |
| 312-943 | ILLINOIS BELL TEL CO | No |
| 312-944 | ILLINOIS BELL TEL CO | No |
| 312-945 | ILLINOIS BELL TEL CO | Yes |
| 312-946 | ILLINOIS BELL TEL CO | No |
| 312-947 | ILLINOIS BELL TEL CO | Yes |
| 312-948 | PAETEC ITEL, LLC | Yes |
| 312-949 | ILLINOIS BELL TEL CO | No |
| 312-951 | ILLINOIS BELL TEL CO | Yes |
| 312-952 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-953 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-954 | ILLINOIS BELL TEL CO | No |
| 312-955 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | No |
| 312-956 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-957 | ILLINOIS BELL TEL CO | Yes |
| 312-960 | ILLINOIS BELL TEL CO | Yes |
| 312-961 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-962 | LEVEL 3 COMMUNICATIONS, LLC - IL | Yes |
| 312-963 | SPOK, INC. | No |
| 312-964 | ONVOY, LLC | Yes |
| 312-965 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | No |
| 312-966 | METROPCS, INC. | Yes |
| 312-967 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-970 | ILLINOIS BELL TEL CO | Yes |
| 312-971 | BANDWIDTH.COM CLEC, LLC - IL | Yes |
| 312-972 | NEW CINGULAR WIRELESS PCS, LLC - IL | No |
| 312-973 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 312-974 | ILLINOIS BELL TEL CO | No |
| 312-975 | T-MOBILE USA, INC. | Yes |
| 312-977 | ILLINOIS BELL TEL CO | No |
| 312-978 | T-MOBILE USA, INC. | Yes |
| 312-979 | ILLINOIS BELL TEL CO | No |
| 312-980 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | No |
| 312-981 | PAETEC ITEL, LLC | Yes |
| 312-982 | COMCAST IP PHONE, LLC | Yes |
| 312-983 | ILLINOIS BELL TEL CO | Yes |
| 312-984 | ILLINOIS BELL TEL CO | No |
| 312-985 | PAETEC ITEL, LLC | Yes |
| 312-986 | ILLINOIS BELL TEL CO | No |
| 312-987 | ILLINOIS BELL TEL CO | No |
| 312-988 | ILLINOIS BELL TEL CO | Yes |
| 312-989 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 312-992 | ILLINOIS BELL TEL CO | No |
| 312-993 | ILLINOIS BELL TEL CO | Yes |
| 312-994 | PAETEC ITEL, LLC | Yes |
| 312-995 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | Yes |
| 312-996 | ILLINOIS BELL TEL CO | No |
| 312-997 | ILLINOIS BELL TEL CO | Yes |
| 312-998 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 312-999 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
FAQ
What area code is Chicago Zone 01, IL?
Chicago Zone 01 is served by 6 area codes — 312, 630, 708, 773, 847, 872 — which overlay the same territory.
How many prefixes does Chicago Zone 01 have?
915 active NXX prefixes are anchored to this rate center in NANPA records, held by 46 carriers.
Is a call from a Chicago Zone 01 prefix really from Chicago Zone 01?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.