Prefix 619-604 — San Diego:san Diego Da, CA

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

Area code
619
Prefix (NXX)
604
State
California
Time zone
Pacific
Code holder
ONVOY, LLC - CA
OCN
649C
Pooled
Yes (thousands-block pooling)
Assigned
2024-01-24
LATA
732

Numbers in the 619-604 prefix are registered to the San Diego:san Diego Da rate center in CA, inside area code 619. The prefix is the second block of a ten-digit US number (619-604-XXXX) and pins the number to a billing locality.

Code-holder of record: ONVOY, LLC - CA (OCN 649C), assigned January 24, 2024. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 619-604 numbers may be served by different companies.

The rate center lies in the San Diego-Cula Vista-Carlsbad, CA Metropolitan Statistical Area. The serving LATA is 732. Local time follows the Pacific zone.

Spoofing means this prefix on your screen doesn't guarantee a San Diego:san Diego Da caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 619-604
PrefixRate centerCode holder
619-601 Chula Vista BANDWIDTH.COM CLEC, LLC - CA
619-602 San Diego:san Diego Da T-MOBILE USA, INC.
619-603 National City T-MOBILE USA, INC.
619-605 San Diego:linda Vista Da COMCAST PHONE OF CALIFORNIA, LLC
619-606 San Diego:san Diego Da NEW CINGULAR WIRELESS PCS, LLC
619-607 San Diego:san Diego Da NEW CINGULAR WIRELESS PCS, LLC

FAQ

Where is 619-604 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 619-604 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 619-604 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.