Prefix 619-304 — San Diego:san Diego Da, CA

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

The 619-304 prefix belongs to area code 619 and is anchored to the San Diego:san Diego Da rate center (CA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

San Diego:san Diego Da is part of the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area. For routing purposes it sits in LATA 732. Numbers here keep Pacific time.

Code-holder of record: ONVOY, LLC - CA (OCN 649C), assigned November 20, 2015. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 619-304 numbers may be served by different companies.

Caller ID showing 619-304 is not proof the call came from San Diego:san Diego Da: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

FAQ

Where is 619-304 located?

The prefix is assigned to the San Diego:san Diego Da rate center in CA, area code 619. It is part of the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area.

Which company owns 619-304 numbers?

ONVOY, LLC - 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 619-304 safe to answer?

The prefix itself says nothing about the caller. Legitimate San Diego:san Diego Da businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.