Prefix 408-338 — Sunnyvale, CA
Numbers in the 408-338 prefix are registered to the Sunnyvale rate center in CA, inside area code 408. The prefix is the second block of a ten-digit US number (408-338-XXXX) and pins the number to a billing locality.
NANPA's central-office code records list PACIFIC BELL (OCN 9740) as the code holder, assigned April 7, 2006. Because 408-338 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
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 Sunnyvale caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 408-335 | Los Gatos | FRONTIER CALIFORNIA INC. |
| 408-336 | Sunnyvale | PACIFIC BELL |
| 408-337 | Gilroy | CHARTER IP ENABLED SERVICES, LLC |
| 408-339 | San Jose:west Da | PACIFIC BELL |
| 408-340 | Campbell | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 408-341 | Campbell | PACIFIC BELL |
FAQ
Where is 408-338 located?
The prefix is assigned to the Sunnyvale rate center in CA, area code 408. It is part of the San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area.
Which company owns 408-338 numbers?
PACIFIC BELL 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 408-338 safe to answer?
The prefix itself says nothing about the caller. Legitimate Sunnyvale businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.