Prefix 619-257 — Chula Vista, CA
- Area code
- 619
- Prefix (NXX)
- 257
- Rate center
- Chula Vista
- State
- California
- Time zone
- Pacific
- Code holder
- T-MOBILE USA, INC.
- OCN
- 6529
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2024-01-11
- LATA
- 732
Numbers in the 619-257 prefix are registered to the Chula Vista rate center in CA, inside area code 619. The prefix is the second block of a ten-digit US number (619-257-XXXX) and pins the number to a billing locality.
NANPA's central-office code records list T-MOBILE USA, INC. (OCN 6529) as the code holder, assigned January 11, 2024. Because 619-257 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
The rate center lies in the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area. The serving LATA is 732. Local time follows the Pacific zone.
Spoofing means this prefix on your screen doesn't guarantee a Chula Vista caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 619-254 | Chula Vista | T-MOBILE USA, INC. |
| 619-255 | San Diego:san Diego Da | COMCAST PHONE OF CALIFORNIA, LLC |
| 619-256 | Chula Vista | SPOK, INC. |
| 619-258 | El Cajon | PACIFIC BELL |
| 619-259 | National City | T-MOBILE USA, INC. |
| 619-260 | San Diego:san Diego Da | PACIFIC BELL |
FAQ
Where is 619-257 located?
The prefix is assigned to the Chula Vista rate center in CA, area code 619. It is part of the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area.
Which company owns 619-257 numbers?
T-MOBILE USA, INC. holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 619-257 safe to answer?
The prefix itself says nothing about the caller. Legitimate Chula Vista businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.