Ontario, CA — rate center
- State
- California
- Active prefixes
- 131
- Carriers
- 28
- Pooled prefixes
- 77
- LATA
- 730
- Metro area
- Riverside-San Bernardino-Ontario, CA MSA
The Ontario rate center (California) anchors 131 active prefixes under area codes 840, 909. Rate centers, not city limits, are what phone numbers are legally tied to.
131 central-office prefixes are currently anchored to this rate center across 28 carriers. 77 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Riverside-San Bernardino-Ontario, CA Metropolitan Statistical Area. Routing-wise it sits in LATA 730.
Multiple area codes over one rate center (840/909) is the overlay pattern: same geography, different first three digits.
At 131 prefixes — a ceiling of 1,310,000 numbers — Ontario is one of California's heavyweight rate centers.
Treat this data as geography of the number, not of the caller: porting, VoIP and caller-ID spoofing all detach the two. When a call matters, hang up and call back through an official number.
Prefixes anchored to Ontario
Showing 124 of 124
| Prefix | Code holder | Pooled |
|---|---|---|
| 909-208 | METROPCS NETWORKS, LLC | Yes |
| 909-210 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-212 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-214 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-215 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-218 | TWC IP ENABLED SERVICES, LLC | Yes |
| 909-223 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-224 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-225 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-226 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-227 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-228 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-229 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-230 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-234 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-235 | METROPCS NETWORKS, LLC | Yes |
| 909-238 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-239 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-240 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-241 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-249 | SPOK, INC. | No |
| 909-259 | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Yes |
| 909-260 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-261 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-262 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-268 | T-MOBILE USA, INC. | Yes |
| 909-284 | METROPCS NETWORKS, LLC | Yes |
| 909-286 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-292 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-295 | METROPCS NETWORKS, LLC | Yes |
| 909-309 | SPOK, INC. | No |
| 909-319 | T-MOBILE USA, INC. | No |
| 909-321 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 909-322 | METROPCS NETWORKS, LLC | Yes |
| 909-331 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
| 909-354 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-376 | T-MOBILE USA, INC. | Yes |
| 909-390 | FRONTIER CALIFORNIA INC. | No |
| 909-391 | FRONTIER CALIFORNIA INC. | No |
| 909-395 | FRONTIER CALIFORNIA INC. | Yes |
| 909-400 | UTILITY TELECOM GROUP, LLC - CA | No |
| 909-405 | SPOK, INC. | No |
| 909-408 | METROPCS NETWORKS, LLC | Yes |
| 909-418 | PACIFIC BELL (COMPETITIVE) | Yes |
| 909-437 | T-MOBILE USA, INC. | Yes |
| 909-443 | ONVOY, LLC - CA | Yes |
| 909-456 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Yes |
| 909-457 | UTILITY TELECOM GROUP, LLC - CA | No |
| 909-458 | FRONTIER CALIFORNIA INC. | Yes |
| 909-459 | FRONTIER CALIFORNIA INC. | Yes |
| 909-460 | FRONTIER CALIFORNIA INC. | Yes |
| 909-467 | FRONTIER CALIFORNIA INC. | Yes |
| 909-472 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | Yes |
| 909-489 | T-MOBILE USA, INC. | Yes |
| 909-490 | T-MOBILE USA, INC. | Yes |
| 909-509 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-510 | PAETEC ITEL, LLC | Yes |
| 909-518 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-519 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-544 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-545 | METROPCS NETWORKS, LLC | Yes |
| 909-563 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | Yes |
| 909-564 | AMERICAN MESSAGING SERVICES, LLC | No |
| 909-604 | AMERICAN MESSAGING SERVICES, LLC | No |
| 909-605 | FRONTIER CALIFORNIA INC. | Yes |
| 909-615 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-635 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-638 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-657 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-661 | NORTH COUNTY COMMUNICATION CORPORATION - CA | No |
| 909-669 | SHELCOMM | No |
| 909-673 | FRONTIER CALIFORNIA INC. | No |
| 909-678 | METROPCS NETWORKS, LLC | Yes |
| 909-687 | T-MOBILE USA, INC. | Yes |
| 909-702 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-704 | METROPCS NETWORKS, LLC | Yes |
| 909-717 | METROPCS NETWORKS, LLC | Yes |
| 909-721 | T-MOBILE USA, INC. | Yes |
| 909-724 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-730 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-731 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-732 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-738 | METROPCS NETWORKS, LLC | Yes |
| 909-740 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | Yes |
| 909-750 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 909-757 | ONVOY, LLC - CA | Yes |
| 909-772 | T-MOBILE USA, INC. | Yes |
| 909-773 | FRONTIER CALIFORNIA INC. | Yes |
| 909-778 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-781 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 909-786 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-789 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-813 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 909-815 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-816 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-821 | METROPCS NETWORKS, LLC | Yes |
| 909-842 | 33 WIRELESS INC. | No |
| 909-843 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | Yes |
| 909-850 | SKYE TELECOM LLC DBA SKYETEL | Yes |
| 909-851 | NEW CINGULAR WIRELESS PCS, LLC | No |
| 909-906 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 909-917 | METROPCS NETWORKS, LLC | Yes |
| 909-923 | FRONTIER CALIFORNIA INC. | No |
| 909-930 | FRONTIER CALIFORNIA INC. | No |
| 909-933 | FRONTIER CALIFORNIA INC. | Yes |
| 909-934 | 33 WIRELESS INC. | No |
| 909-935 | MATRIX TELECOM, LLC. S/I/I TNCI - CA | Yes |
| 909-937 | FRONTIER CALIFORNIA INC. | Yes |
| 909-938 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-947 | FRONTIER CALIFORNIA INC. | No |
| 909-952 | METROPCS NETWORKS, LLC | Yes |
| 909-957 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 909-966 | FRACTEL, LLC | Yes |
| 909-969 | AT&T - LOCAL | Yes |
| 909-972 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 909-974 | FRONTIER CALIFORNIA INC. | Yes |
| 909-975 | FRONTIER CALIFORNIA INC. | Yes |
| 909-983 | FRONTIER CALIFORNIA INC. | No |
| 909-984 | FRONTIER CALIFORNIA INC. | No |
| 909-986 | FRONTIER CALIFORNIA INC. | No |
| 909-988 | FRONTIER CALIFORNIA INC. | No |
| 909-994 | METROPCS NETWORKS, LLC | Yes |
| 909-995 | UTILITY TELECOM GROUP, LLC - CA | Yes |
| 909-996 | NEW CINGULAR WIRELESS PCS, LLC | No |
FAQ
What area code is Ontario, CA?
Ontario is served by 2 area codes — 840, 909 — which overlay the same territory.
How many prefixes does Ontario have?
131 active NXX prefixes are anchored to this rate center in NANPA records, held by 28 carriers.
Is a call from a Ontario prefix really from Ontario?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.