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

IGNACIO prefixes in area code 415

NANPA records 13 assigned NXX blocks to rate center IGNACIO in area code 415, 1.7% 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 PACIFIC BELL (4), ONVOY, LLC - CA (3), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2). The earliest assignment on record here is 2002-09-19 and the most recent 2014-09-18. 10 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 codes 628, 748, 970 – overlay codes cover the same geography, so a rate center is served by all of them.

13 assigned blocks – 1.7% of 415
7 holders of record
10 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
415-234 Onvoy ONVOY, LLC - CA – yes yes
415-251 Onvoy ONVOY, LLC - CA 2006-11-21 yes yes
415-382 AT&T PACIFIC BELL – no yes
415-475 Onvoy ONVOY, LLC - CA – yes yes
415-483 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
415-506 AT&T PACIFIC BELL – yes yes
415-612 T-Mobile T-MOBILE USA, INC. 2002-09-19 yes yes
415-763 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
415-842 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
415-881 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
415-883 AT&T PACIFIC BELL – no yes
415-884 AT&T PACIFIC BELL – no yes
415-996 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2014-09-18 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
PACIFIC BELL AT&T 4 30.8%
ONVOY, LLC - CA Onvoy 3 23.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 15.4%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 7.7%
T-MOBILE USA, INC. T-Mobile 1 7.7%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 7.7%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 7.7%

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 IGNACIO in area code 415?

13 blocks: 234, 251, 382, 475, 483, 506, 612, 763, 842, 881, 883, 884 and 1 more, all listed in the table above.

Which carriers have numbers in IGNACIO?

PACIFIC BELL (4 blocks), ONVOY, LLC - CA (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (1 block), T-MOBILE USA, INC. (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 IGNACIO 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