Prefix 408-663 — Sunnyvale, CA
A phone number starting 408-663 was issued in the Sunnyvale rate center of CA — part of area code 408.
NANPA's central-office code records list CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (OCN 6006) as the code holder, assigned November 16, 2010. Because 408-663 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
A scammer can display 408-663 without ever touching CA. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.
Sunnyvale 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.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 408-660 | San Jose:west Da | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA |
| 408-661 | San Jose:south Da | METROPCS, INC. |
| 408-662 | San Jose:north Da | LEVEL 3 COMMUNICATIONS, LLC - CA |
| 408-664 | Sunnyvale | TELEPORT COMMUNICATIONS AMERICA, LLC - CA |
| 408-665 | Gilroy | METROPCS, INC. |
| 408-666 | San Jose:west Da | NEW CINGULAR WIRELESS PCS, LLC |
FAQ
Where is 408-663 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 408-663 numbers?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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 408-663 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.