Prefix 415-426 — San Francisco:central Da, CA

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

Area code
415
Prefix (NXX)
426
State
California
Time zone
Pacific
Code holder
T-MOBILE USA, INC.
OCN
6529
Pooled
Yes (thousands-block pooling)
Assigned
2011-10-24
LATA
722

Numbers in the 415-426 prefix are registered to the San Francisco:central Da rate center in CA, inside area code 415. The prefix is the second block of a ten-digit US number (415-426-XXXX) and pins the number to a billing locality.

The assigned code holder is T-MOBILE USA, INC., operating company number 6529, assigned October 24, 2011. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

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.

Spoofing means this prefix on your screen doesn't guarantee a San Francisco:central Da caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 415-426
PrefixRate centerCode holder
415-423 San Francisco:central Da CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
415-424 San Francisco:montrose-evergreen Da LEVEL 3 COMMUNICATIONS, LLC - CA
415-425 San Francisco:montrose-evergreen Da T-MOBILE USA, INC.
415-427 San Francisco:central Da PACIFIC BELL
415-428 San Francisco:central Da NORTH COUNTY COMMUNICATION CORPORATION - CA
415-429 San Francisco:central Da T-MOBILE USA, INC.

FAQ

Where is 415-426 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 415-426 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 415-426 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.