Prefix 415-521 — San Rafael, CA
- Area code
- 415
- Prefix (NXX)
- 521
- Rate center
- San Rafael
- State
- California
- Time zone
- Pacific
- Code holder
- CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
- OCN
- 6006
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2013-02-18
- LATA
- 722
415-521 identifies a block of numbers in San Rafael, CA, within the 415 area code. Every US prefix is tied to exactly one rate center; this one is San Rafael.
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 — 415-521 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 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA, operating company number 6006, assigned February 18, 2013. 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 |
|---|---|---|
| 415-518 | San Francisco:central Da | NEW CINGULAR WIRELESS PCS, LLC |
| 415-519 | San Francisco:central Da | NEW CINGULAR WIRELESS PCS, LLC |
| 415-520 | San Francisco:central Da | ONVOY, LLC - CA |
| 415-522 | San Francisco:central Da | PACIFIC BELL |
| 415-523 | San Francisco:central Da | PEERLESS NETWORK OF CALIFORNIA, LLC - CA |
| 415-524 | San Rafael | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA |
FAQ
Where is 415-521 located?
The prefix is assigned to the San Rafael rate center in CA, area code 415. It is part of the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area.
Which company owns 415-521 numbers?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 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 415-521 safe to answer?
The prefix itself says nothing about the caller. Legitimate San Rafael businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.