Prefix 415-638 — San Francisco:central Da, CA

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

A phone number starting 415-638 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 28, 2013. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 415-638 numbers may be served by different companies.

A scammer can display 415-638 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

FAQ

Where is 415-638 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 415-638 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 415-638 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.