Prefix 408-641 — San Jose:west Da, CA

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

Area code
408
Prefix (NXX)
641
Rate center
San Jose:west Da
State
California
Time zone
Pacific
Code holder
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
OCN
671J
Pooled
Yes (thousands-block pooling)
Assigned
2010-02-22
LATA
722

The 408-641 prefix belongs to area code 408 and is anchored to the San Jose:west Da rate center (CA). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

San Jose:west 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 U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (OCN 671J) as the code holder, assigned February 22, 2010. Because 408-641 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.

Caller ID showing 408-641 is not proof the call came from San Jose:west 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

Prefixes adjacent to 408-641
PrefixRate centerCode holder
408-638 San Jose:west Da METROPCS, INC.
408-639 San Jose:west Da T-MOBILE USA, INC.
408-640 San Jose:west Da METROPCS, INC.
408-642 San Jose:west Da CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
408-643 San Jose:north Da T-MOBILE USA, INC.
408-644 San Jose:south Da T-MOBILE USA, INC.

FAQ

Where is 408-641 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 408-641 numbers?

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 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 408-641 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.