Prefix 415-400 — San Francisco:central Da, CA

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

Numbers in the 415-400 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 (415-400-XXXX) and pins the number to a billing locality.

NANPA's central-office code records list RACE TELECOMMUNICATIONS, INC. - CA (OCN 973E) as the code holder, assigned January 14, 2009. Because 415-400 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

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

FAQ

Where is 415-400 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 415-400 numbers?

RACE TELECOMMUNICATIONS, INC. - 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 415-400 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.