La Jolla, CA — rate center
- State
- California
- Active prefixes
- 169
- Carriers
- 23
- Pooled prefixes
- 106
- LATA
- 732
- Metro area
- San Diego-Cula Vista-Carlsbad, CA MSA
The La Jolla rate center (California) anchors 169 active prefixes under area codes 619, 858. Rate centers, not city limits, are what phone numbers are legally tied to.
NANPA records show 169 active prefixes here across 23 carriers. 106 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.
At 169 prefixes — a ceiling of 1,690,000 numbers — La Jolla is one of California's heavyweight rate centers.
As always with US numbering: a prefix anchored to La Jolla tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.
Prefixes anchored to La Jolla
| Prefix | Code holder | Pooled |
|---|---|---|
| 619-742 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | No |
| 619-812 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 619-953 | T-MOBILE USA, INC. | Yes |
FAQ
What area code is La Jolla, CA?
La Jolla is served by 2 area codes — 619, 858 — which overlay the same territory.
How many prefixes does La Jolla have?
169 active NXX prefixes are anchored to this rate center in NANPA records, held by 23 carriers.
Is a call from a La Jolla prefix really from La Jolla?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.