La Mesa, CA — rate center
- State
- California
- Active prefixes
- 69
- Carriers
- 16
- Pooled prefixes
- 52
- LATA
- 732
- Metro area
- San Diego-Cula Vista-Carlsbad, CA MSA
The La Mesa rate center (California) anchors 69 active prefixes under area codes 619, 858. Rate centers, not city limits, are what phone numbers are legally tied to.
The rate center currently carries 69 working prefixes across 16 carriers. 52 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area. Routing-wise it sits in LATA 732.
Multiple area codes over one rate center (619/858) is the overlay pattern: same geography, different first three digits.
A La Mesa 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 La Mesa
| Prefix | Code holder | Pooled |
|---|---|---|
| 619-248 | T-MOBILE USA, INC. | Yes |
| 619-251 | T-MOBILE USA, INC. | Yes |
| 619-303 | COMCAST PHONE OF CALIFORNIA, LLC | No |
| 619-315 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | Yes |
| 619-335 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 619-337 | PACIFIC BELL | Yes |
| 619-340 | T-MOBILE USA, INC. | Yes |
| 619-355 | 33 WIRELESS INC. | No |
| 619-388 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 619-403 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Yes |
| 619-414 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Yes |
| 619-415 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Yes |
| 619-433 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 619-439 | COMCAST PHONE OF CALIFORNIA, LLC | Yes |
| 619-454 | METROPCS, INC. | Yes |
| 619-460 | PACIFIC BELL | No |
| 619-461 | PACIFIC BELL | No |
| 619-462 | PACIFIC BELL | No |
| 619-463 | PACIFIC BELL | No |
| 619-464 | PACIFIC BELL | Yes |
| 619-465 | PACIFIC BELL | No |
| 619-466 | PACIFIC BELL | No |
| 619-467 | AT&T ENTERPRISES, LLC | Yes |
| 619-469 | PACIFIC BELL | No |
| 619-490 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 619-567 | LEVEL 3 COMMUNICATIONS, LLC - CA | Yes |
| 619-589 | PACIFIC BELL | No |
| 619-597 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 619-609 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 619-613 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 619-639 | ONVOY, LLC - CA | Yes |
| 619-644 | PACIFIC BELL | No |
| 619-648 | ONVOY, LLC - CA | Yes |
| 619-657 | T-MOBILE USA, INC. | Yes |
| 619-660 | PACIFIC BELL | No |
| 619-667 | PACIFIC BELL | No |
| 619-668 | PACIFIC BELL | No |
| 619-669 | PACIFIC BELL | Yes |
| 619-670 | PACIFIC BELL | No |
| 619-697 | PACIFIC BELL | No |
| 619-698 | PACIFIC BELL | No |
| 619-713 | COMCAST PHONE OF CALIFORNIA, LLC | Yes |
| 619-724 | ONVOY, LLC - CA | Yes |
| 619-740 | PACIFIC BELL | Yes |
| 619-741 | COMCAST PHONE OF CALIFORNIA, LLC | Yes |
| 619-750 | T-MOBILE USA, INC. | Yes |
| 619-771 | ONVOY, LLC - CA | Yes |
| 619-772 | METROPCS, INC. | Yes |
| 619-776 | NEW CINGULAR WIRELESS PCS, LLC | Yes |
| 619-784 | METROPCS, INC. | Yes |
| 619-797 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 619-825 | COMCAST PHONE OF CALIFORNIA, LLC | Yes |
| 619-828 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Yes |
| 619-832 | ONVOY, LLC - CA | Yes |
| 619-859 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Yes |
| 619-867 | T-MOBILE USA, INC. | Yes |
| 619-916 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Yes |
| 619-928 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Yes |
| 619-945 | COMCAST PHONE OF CALIFORNIA, LLC | Yes |
| 619-951 | T-MOBILE USA, INC. | Yes |
| 619-983 | T-MOBILE USA, INC. | Yes |
FAQ
What area code is La Mesa, CA?
La Mesa is served by 2 area codes — 619, 858 — which overlay the same territory.
How many prefixes does La Mesa have?
69 active NXX prefixes are anchored to this rate center in NANPA records, held by 16 carriers.
Is a call from a La Mesa prefix really from La Mesa?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.