Prefix 408-684 — San Jose:north Da, CA

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

Area code
408
Prefix (NXX)
684
Rate center
San Jose:north Da
State
California
Time zone
Pacific
Code holder
LEVEL 3 COMMUNICATIONS, LLC - CA
OCN
8826
Pooled
Yes (thousands-block pooling)
Assigned
2010-06-04
LATA
722

Numbers in the 408-684 prefix are registered to the San Jose:north Da rate center in CA, inside area code 408. The prefix is the second block of a ten-digit US number (408-684-XXXX) and pins the number to a billing locality.

The assigned code holder is LEVEL 3 COMMUNICATIONS, LLC - CA, operating company number 8826, assigned June 4, 2010. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.

The rate center lies in the San Francisco-Oakland-Fremont, 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 San Jose:north Da caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 408-684
PrefixRate centerCode holder
408-681 San Martin PACIFIC BELL
408-682 San Martin PACIFIC BELL
408-683 San Martin PACIFIC BELL
408-685 Sunnyvale METROPCS, INC.
408-686 San Martin PACIFIC BELL
408-687 San Jose:north Da METROPCS, INC.

FAQ

Where is 408-684 located?

The prefix is assigned to the San Jose:north Da rate center in CA, area code 408. It is part of the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area.

Which company owns 408-684 numbers?

LEVEL 3 COMMUNICATIONS, 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 408-684 safe to answer?

The prefix itself says nothing about the caller. Legitimate San Jose:north Da businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.