Prefix 415-791 — San Francisco:central Da, CA

NANPA CO code assignment, current as of July 28, 2026.

Area code
415
Prefix (NXX)
791
State
California
Time zone
Pacific
Code holder
T-MOBILE USA, INC.
OCN
6529
Pooled
Yes (thousands-block pooling)
Assigned
2024-01-11
LATA
722

The 415-791 prefix belongs to area code 415 and is anchored to the San Francisco:central Da rate center (CA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

San Francisco:central Da is part of the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area. For routing purposes it sits in LATA 722. Numbers here keep Pacific time.

NANPA's central-office code records list T-MOBILE USA, INC. (OCN 6529) as the code holder, assigned January 11, 2024. Because 415-791 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 415-791 is not proof the call came from San Francisco:central Da: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

Prefixes adjacent to 415-791
PrefixRate centerCode holder
415-788 San Francisco:central Da PACIFIC BELL
415-789 Belvedere PACIFIC BELL
415-790 San Francisco:central Da AMERICAN MESSAGING SERVICES, LLC
415-792 San Francisco:central Da T-MOBILE USA, INC.
415-793 San Francisco:central Da CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
415-794 San Francisco:central Da NEW CINGULAR WIRELESS PCS, LLC

FAQ

Where is 415-791 located?

The prefix is assigned to the San Francisco:central Da rate center in CA, area code 415. It is part of the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area.

Which company owns 415-791 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 415-791 safe to answer?

The prefix itself says nothing about the caller. Legitimate San Francisco:central Da businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.