Prefix 408-381 — San Jose:west Da, CA

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

Numbers in the 408-381 prefix are registered to the San Jose:west Da rate center in CA, inside area code 408. The prefix is the second block of a ten-digit US number (408-381-XXXX) and pins the number to a billing locality.

Code-holder of record: ONVOY, LLC - CA (OCN 649C), assigned September 16, 2021. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 408-381 numbers may be served by different companies.

The rate center lies in the San Jose-Sunnyvale-Santa Clara, 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 Jose:west Da caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

FAQ

Where is 408-381 located?

The prefix is assigned to the San Jose:west Da rate center in CA, area code 408. It is part of the San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area.

Which company owns 408-381 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 408-381 safe to answer?

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