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

FOLSOM prefixes in area code 916

NANPA records 57 assigned NXX blocks to rate center FOLSOM in area code 916, 7.3% 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. 15 holders hold those blocks, the largest being PACIFIC BELL (21), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (5), NEW CINGULAR WIRELESS PCS, LLC (4). The earliest assignment on record here is 2001-06-05 and the most recent 2021-07-29. 40 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 279, 985 – overlay codes cover the same geography, so a rate center is served by all of them.

57 assigned blocks – 7.3% of 916
15 holders of record
40 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
916-220 T-Mobile T-MOBILE USA, INC. 2001-12-28 no yes
916-221 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
916-235 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
916-260 AT&T NEW CINGULAR WIRELESS PCS, LLC 2016-09-21 yes yes
916-292 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2012-09-07 yes yes
916-293 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2004-07-01 yes yes
916-294 AT&T PACIFIC BELL – yes yes
916-337 AT&T NEW CINGULAR WIRELESS PCS, LLC – yes yes
916-350 AT&T AT&T - LOCAL – yes yes
916-351 AT&T PACIFIC BELL – no yes
916-353 AT&T PACIFIC BELL – yes yes
916-355 AT&T PACIFIC BELL – no yes
916-356 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – no yes
916-357 AT&T PACIFIC BELL – yes yes
916-358 AT&T PACIFIC BELL – yes yes
916-365 TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS – yes yes
916-370 T-Mobile METROPCS, INC. 2001-12-28 yes yes
916-377 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – no yes
916-404 Onvoy ONVOY, LLC - CA – no yes
916-413 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2017-11-10 yes yes
916-439 T-Mobile METROPCS, INC. – yes yes
916-458 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA 2001-06-05 yes yes
916-461 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2015-09-28 yes yes
916-467 AT&T AT&T ENTERPRISES, LLC 2006-01-25 yes yes
916-496 T-Mobile METROPCS, INC. – yes yes
916-500 Onvoy ONVOY, LLC - CA – yes yes
916-510 T-Mobile T-MOBILE USA, INC. 2020-08-25 yes yes
916-542 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2012-09-10 yes yes
916-586 AT&T NEW CINGULAR WIRELESS PCS, LLC 2014-10-02 yes yes
916-597 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2013-11-26 yes yes
916-605 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA – yes yes
916-608 AT&T PACIFIC BELL – no yes
916-618 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA 2019-09-25 yes yes
916-673 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
916-693 T-Mobile T-MOBILE USA, INC. 2015-03-17 yes yes
916-790 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2010-07-12 yes yes
916-805 Onvoy ONVOY, LLC - CA 2014-06-16 yes yes
916-817 AT&T PACIFIC BELL – yes yes
916-836 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2015-07-29 yes yes
916-850 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
916-906 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2021-01-21 yes yes
916-932 Allstream ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM – yes yes
916-933 AT&T PACIFIC BELL – no yes
916-934 AT&T PACIFIC BELL – yes yes
916-935 AT&T PACIFIC BELL – no yes
916-936 AT&T NEW CINGULAR WIRELESS PCS, LLC 2014-03-27 yes yes
916-939 AT&T PACIFIC BELL – no yes
916-941 AT&T PACIFIC BELL – yes yes
916-954 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2021-07-29 yes yes
916-983 AT&T PACIFIC BELL – no yes
916-984 AT&T PACIFIC BELL – no yes
916-985 AT&T PACIFIC BELL – no yes
916-986 AT&T PACIFIC BELL – no yes
916-987 AT&T PACIFIC BELL – no yes
916-988 AT&T PACIFIC BELL – no yes
916-989 AT&T PACIFIC BELL – no yes
916-990 AT&T PACIFIC BELL – 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 21 36.8%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA Verizon 5 8.8%
NEW CINGULAR WIRELESS PCS, LLC AT&T 4 7%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 4 7%
T-MOBILE USA, INC. T-Mobile 3 5.3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 3 5.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA Verizon 3 5.3%
METROPCS, INC. T-Mobile 3 5.3%
ONVOY, LLC - CA Onvoy 3 5.3%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 2 3.5%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 2 3.5%
AT&T - LOCAL AT&T 1 1.8%
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS TPx 1 1.8%
AT&T ENTERPRISES, LLC AT&T 1 1.8%
ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM Allstream 1 1.8%

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 FOLSOM in area code 916?

57 blocks: 220, 221, 235, 260, 292, 293, 294, 337, 350, 351, 353, 355 and 45 more, all listed in the table above.

Which carriers have numbers in FOLSOM?

PACIFIC BELL (21 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (5 blocks), NEW CINGULAR WIRELESS PCS, LLC (4 blocks), BANDWIDTH.COM CLEC, LLC - CA (4 blocks), T-MOBILE USA, INC. (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is FOLSOM 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 916

All 785 prefixes in 916