Prefix 408-336 — Sunnyvale, CA
408-336 identifies a block of numbers in Sunnyvale, CA, within the 408 area code. Every US prefix is tied to exactly one rate center; this one is Sunnyvale.
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.
Treat the on-screen number as a hint, not evidence — 408-336 can be spoofed like any US prefix. If a call feels off, verify through an official callback number and file a complaint with the FCC or FTC.
Code-holder of record: PACIFIC BELL (OCN 9740), assigned April 19, 2006. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 408-336 numbers may be served by different companies.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 408-333 | San Jose:south Da | LEVEL 3 COMMUNICATIONS, LLC - CA |
| 408-334 | San Jose:west Da | NEW CINGULAR WIRELESS PCS, LLC |
| 408-335 | Los Gatos | FRONTIER CALIFORNIA INC. |
| 408-337 | Gilroy | CHARTER IP ENABLED SERVICES, LLC |
| 408-338 | Sunnyvale | PACIFIC BELL |
| 408-339 | San Jose:west Da | PACIFIC BELL |
FAQ
Where is 408-336 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 408-336 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 408-336 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.