Prefix 415-231 — San Francisco:montrose-evergreen Da, CA
- Area code
- 415
- Prefix (NXX)
- 231
- Rate center
- San Francisco:montrose-evergreen Da
- State
- California
- Time zone
- Pacific
- Code holder
- T-MOBILE USA, INC.
- OCN
- 6529
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2012-11-29
- LATA
- 722
415-231 identifies a block of numbers in San Francisco:montrose-evergreen Da, CA, within the 415 area code. Every US prefix is tied to exactly one rate center; this one is San Francisco:montrose-evergreen Da.
The rate center lies in the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area. The serving LATA is 722. Local time follows the Pacific zone.
Treat the on-screen number as a hint, not evidence — 415-231 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
The assigned code holder is T-MOBILE USA, INC., operating company number 6529, assigned November 29, 2012. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 415-228 | San Francisco:central Da | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 415-229 | San Francisco:central Da | TELEPORT COMMUNICATIONS AMERICA, LLC - CA |
| 415-230 | San Francisco:central Da | ONVOY, LLC - CA |
| 415-232 | San Francisco:central Da | UTILITY TELECOM GROUP, LLC - CA |
| 415-233 | San Rafael | LEVEL 3 COMMUNICATIONS, LLC - CA |
| 415-234 | Ignacio | ONVOY, LLC - CA |
FAQ
Where is 415-231 located?
The prefix is assigned to the San Francisco:montrose-evergreen Da rate center in CA, area code 415. It is part of the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area.
Which company owns 415-231 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 415-231 safe to answer?
The prefix itself says nothing about the caller. Legitimate San Francisco:montrose-evergreen Da businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.