Belvedere, CA — rate center
- State
- California
- Active prefixes
- 25
- Carriers
- 12
- Pooled prefixes
- 24
- LATA
- 722
- Metro area
- San Francisco-Oakland-Fremont, CA MSA
The Belvedere rate center (California) anchors 25 active prefixes under area codes 415, 628. Rate centers, not city limits, are what phone numbers are legally tied to.
The rate center currently carries 25 working prefixes across 12 carriers. 24 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the San Francisco-Oakland-Fremont, CA Metropolitan Statistical Area. Routing-wise it sits in LATA 722.
Multiple area codes over one rate center (415/628) is the overlay pattern: same geography, different first three digits.
A Belvedere prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Belvedere
| Prefix | Code holder | Pooled |
|---|---|---|
| 415-316 | T-MOBILE USA, INC. | Yes |
| 415-366 | ONVOY, LLC - CA | Yes |
| 415-435 | PACIFIC BELL | No |
| 415-619 | T-MOBILE USA, INC. | Yes |
| 415-690 | T-MOBILE USA, INC. | Yes |
| 415-691 | LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Yes |
| 415-712 | BANDWIDTH.COM CLEC, LLC - CA | Yes |
| 415-789 | PACIFIC BELL | Yes |
| 415-797 | T-MOBILE USA, INC. | Yes |
| 415-889 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | Yes |
| 415-900 | ONVOY, LLC - CA | Yes |
| 415-910 | T-MOBILE USA, INC. | Yes |
| 415-937 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | Yes |
| 415-960 | T-MOBILE USA, INC. | Yes |
| 415-966 | T-MOBILE USA, INC. | Yes |
FAQ
What area code is Belvedere, CA?
Belvedere is served by 2 area codes — 415, 628 — which overlay the same territory.
How many prefixes does Belvedere have?
25 active NXX prefixes are anchored to this rate center in NANPA records, held by 12 carriers.
Is a call from a Belvedere prefix really from Belvedere?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.