Prefix 408-677 — San Jose:south Da, CA
- Area code
- 408
- Prefix (NXX)
- 677
- Rate center
- San Jose:south Da
- State
- California
- Time zone
- Pacific
- Code holder
- T-MOBILE USA, INC.
- OCN
- 6529
- Pooled
- Yes (thousands-block pooling)
- Assigned
- 2006-02-22
- LATA
- 722
408-677 identifies a block of numbers in San Jose:south Da, CA, within the 408 area code. Every US prefix is tied to exactly one rate center; this one is San Jose:south Da.
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 — 408-677 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.
The assigned code holder is T-MOBILE USA, INC., operating company number 6529, assigned February 22, 2006. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 408-674 | San Jose:west Da | NEW CINGULAR WIRELESS PCS, LLC |
| 408-675 | Sunnyvale | LEVEL 3 COMMUNICATIONS, LLC - CA |
| 408-676 | San Martin | ONVOY, LLC - CA |
| 408-678 | San Jose:north Da | TELEPORT COMMUNICATIONS AMERICA, LLC - CA |
| 408-679 | Campbell | NEW CINGULAR WIRELESS PCS, LLC |
| 408-680 | Campbell | T-MOBILE USA, INC. |
FAQ
Where is 408-677 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 408-677 numbers?
T-MOBILE USA, INC. 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 408-677 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.