SAUSALITO prefixes in area code 415
NANPA records 18 assigned NXX blocks to rate center SAUSALITO in area code 415, 2.3% 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. 11 holders hold those blocks, the largest being PACIFIC BELL (4), BANDWIDTH.COM CLEC, LLC - CA (3), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2). The earliest assignment on record here is 2002-01-29 and the most recent 2025-06-25. 16 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.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 415-272 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 415-275 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 415-289 | AT&T PACIFIC BELL | – | yes | yes |
| 415-324 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 415-331 | AT&T PACIFIC BELL | – | no | yes |
| 415-332 | AT&T PACIFIC BELL | – | no | yes |
| 415-339 | AT&T PACIFIC BELL | – | yes | yes |
| 415-367 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 415-415 | WIDE VOICE, LLC - CA | 2025-06-25 | yes | yes |
| 415-465 | T-Mobile T-MOBILE USA, INC. | 2002-01-29 | yes | yes |
| 415-480 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 415-687 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-06-29 | yes | yes |
| 415-729 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 415-754 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 415-855 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-10-30 | yes | yes |
| 415-887 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 415-942 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-06-23 | yes | yes |
| 415-944 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | 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
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 4 | 22.2% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 3 | 16.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 2 | 11.1% |
| ONVOY, LLC - CA | Onvoy | 2 | 11.1% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 1 | 5.6% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 5.6% |
| WIDE VOICE, LLC - CA | – | 1 | 5.6% |
| T-MOBILE USA, INC. | T-Mobile | 1 | 5.6% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 5.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 1 | 5.6% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 1 | 5.6% |
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 SAUSALITO in area code 415?
18 blocks: 272, 275, 289, 324, 331, 332, 339, 367, 415, 465, 480, 687 and 6 more, all listed in the table above.
Which carriers have numbers in SAUSALITO?
PACIFIC BELL (4 blocks), BANDWIDTH.COM CLEC, LLC - CA (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), ONVOY, LLC - CA (2 blocks), NEW CINGULAR WIRELESS PCS, LLC (1 block), LEVEL 3 TELECOM OF CALIFORNIA, LP - 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 SAUSALITO 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.