NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

BELVEDERE prefixes in area code 415

NANPA records 15 assigned NXX blocks to rate center BELVEDERE in area code 415, 1.9% of the 785 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 7 holders hold those blocks, the largest being T-MOBILE USA, INC. (7), ONVOY, LLC - CA (2), PACIFIC BELL (2). The earliest assignment on record here is 2002-09-19 and the most recent 2015-08-03. 14 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 628 – overlay codes cover the same geography, so a rate center is served by all of them.

15 assigned blocks – 1.9% of 415
7 holders of record
14 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
415-316 T-Mobile T-MOBILE USA, INC. 2011-08-09 yes yes
415-366 Onvoy ONVOY, LLC - CA – yes yes
415-435 AT&T PACIFIC BELL – no yes
415-619 T-Mobile T-MOBILE USA, INC. 2015-08-03 yes yes
415-690 T-Mobile T-MOBILE USA, INC. 2002-09-19 yes yes
415-691 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
415-712 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2013-05-14 yes yes
415-789 AT&T PACIFIC BELL – yes yes
415-797 T-Mobile T-MOBILE USA, INC. – yes yes
415-889 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
415-900 Onvoy ONVOY, LLC - CA – yes yes
415-910 T-Mobile T-MOBILE USA, INC. 2015-05-01 yes yes
415-937 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
415-960 T-Mobile T-MOBILE USA, INC. 2014-07-21 yes yes
415-966 T-Mobile T-MOBILE USA, INC. 2014-10-20 yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
T-MOBILE USA, INC. T-Mobile 7 46.7%
ONVOY, LLC - CA Onvoy 2 13.3%
PACIFIC BELL AT&T 2 13.3%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 6.7%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 6.7%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 6.7%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 6.7%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to BELVEDERE in area code 415?

15 blocks: 316, 366, 435, 619, 690, 691, 712, 789, 797, 889, 900, 910 and 3 more, all listed in the table above.

Which carriers have numbers in BELVEDERE?

T-MOBILE USA, INC. (7 blocks), ONVOY, LLC - CA (2 blocks), PACIFIC BELL (2 blocks), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1 block), BANDWIDTH.COM CLEC, LLC - CA (1 block), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is BELVEDERE a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 415

All 785 prefixes in 415