Prefix 415-866 — San Francisco:central Da, CA

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

Numbers in the 415-866 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 (415-866-XXXX) and pins the number to a billing locality.

Code-holder of record: NEW CINGULAR WIRELESS PCS, LLC (OCN 6010), assigned May 11, 2011. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 415-866 numbers may be served by different companies.

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 415-866 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 415-866 numbers?

NEW CINGULAR WIRELESS PCS, LLC 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 415-866 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.