Prefix 408-403 — San Jose:south Da, CA
- Area code
- 408
- Prefix (NXX)
- 403
- Rate center
- San Jose:south Da
- State
- California
- Time zone
- Pacific
- Code holder
- ONVOY, LLC - CA
- OCN
- 649C
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2023-09-19
- LATA
- 722
The 408-403 prefix belongs to area code 408 and is anchored to the San Jose:south Da rate center (CA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
San Jose:south Da is part of the San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area. For routing purposes it sits in LATA 722. Numbers here keep Pacific time.
NANPA's central-office code records list ONVOY, LLC - CA (OCN 649C) as the code holder, assigned September 19, 2023. Because 408-403 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
Caller ID showing 408-403 is not proof the call came from San Jose:south 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
| Prefix | Rate center | Code holder |
|---|---|---|
| 408-400 | Sunnyvale | PACIFIC BELL |
| 408-401 | San Jose:west Da | METROPCS, INC. |
| 408-402 | Los Gatos | FRONTIER CALIFORNIA INC. |
| 408-404 | San Jose:north Da | LEVEL 3 COMMUNICATIONS, LLC - CA |
| 408-405 | Salinas | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 408-406 | San Jose:west Da | NEW CINGULAR WIRELESS PCS, LLC |
FAQ
Where is 408-403 located?
The prefix is assigned to the San Jose:south 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 408-403 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 408-403 safe to answer?
The prefix itself says nothing about the caller. Legitimate San Jose:south Da businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.