Prefix 415-423 — San Francisco:central Da, CA

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

Area code
415
Prefix (NXX)
423
State
California
Time zone
Pacific
Code holder
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
OCN
6006
Pooled
Yes (thousands-block pooling)
Assigned
2012-06-25
LATA
722

A phone number starting 415-423 was issued in the San Francisco:central Da rate center of CA — part of area code 415.

Code-holder of record: CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (OCN 6006), assigned June 25, 2012. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 415-423 numbers may be served by different companies.

A scammer can display 415-423 without ever touching CA. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.

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.

Neighboring prefixes

Prefixes adjacent to 415-423
PrefixRate centerCode holder
415-420 San Francisco:central Da NEW CINGULAR WIRELESS PCS, LLC
415-421 San Francisco:central Da PACIFIC BELL
415-422 San Francisco:montrose-evergreen Da PACIFIC BELL
415-424 San Francisco:montrose-evergreen Da LEVEL 3 COMMUNICATIONS, LLC - CA
415-425 San Francisco:montrose-evergreen Da T-MOBILE USA, INC.
415-426 San Francisco:central Da T-MOBILE USA, INC.

FAQ

Where is 415-423 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 415-423 numbers?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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 415-423 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.