Prefix 415-266 — San Francisco:central Da, CA

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

Area code
415
Prefix (NXX)
266
State
California
Time zone
Pacific
Code holder
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
OCN
671J
Pooled
Yes (thousands-block pooling)
Assigned
2011-07-25
LATA
722

415-266 identifies a block of numbers in San Francisco:central Da, CA, within the 415 area code. Every US prefix is tied to exactly one rate center; this one is San Francisco:central 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 — 415-266 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.

Code-holder of record: U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (OCN 671J), assigned July 25, 2011. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 415-266 numbers may be served by different companies.

Neighboring prefixes

Prefixes adjacent to 415-266
PrefixRate centerCode holder
415-263 San Francisco:central Da PACIFIC BELL
415-264 San Francisco:central Da CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
415-265 San Francisco:central Da CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
415-267 San Francisco:central Da PACIFIC BELL
415-268 San Francisco:central Da TELEPORT COMMUNICATIONS AMERICA, LLC - CA
415-269 San Francisco:central Da NEW CINGULAR WIRELESS PCS, LLC

FAQ

Where is 415-266 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 415-266 numbers?

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 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 415-266 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.