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

LONGMONT prefixes in area code 720

NANPA records 39 assigned NXX blocks to rate center LONGMONT in area code 720, 5.0% 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. 10 holders hold those blocks, the largest being BANDWIDTH.COM CLEC, LLC - CO (8), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6), T-MOBILE USA, INC. (6). The earliest assignment on record here is 2006-09-26 and the most recent 2024-04-03. 37 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 303, 983 – overlay codes cover the same geography, so a rate center is served by all of them.

39 assigned blocks – 5% of 720
10 holders of record
37 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
720-204 Lumen LEVEL 3 COMMUNICATIONS, LLC - CO – yes yes
720-340 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2009-09-04 yes yes
720-378 AT&T NEW CINGULAR WIRELESS PCS, LLC 2010-01-19 yes yes
720-438 Onvoy ONVOY, LLC - CO 2006-09-26 yes yes
720-442 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2011-04-04 yes yes
720-453 T-Mobile T-MOBILE USA, INC. – yes yes
720-487 Telnyx TELNYX LLC 2016-12-09 yes yes
720-491 AT&T NEW CINGULAR WIRELESS PCS, LLC 2011-11-16 yes yes
720-494 Lumen QWEST CORPORATION – no yes
720-526 AT&T NEW CINGULAR WIRELESS PCS, LLC 2014-06-12 yes yes
720-534 Vonage VONAGE AMERICA LLC 2016-08-31 yes yes
720-552 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2012-11-16 yes yes
720-597 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2016-01-11 yes yes
720-600 Onvoy ONVOY, LLC - CO 2012-12-20 yes yes
720-652 Lumen QWEST CORPORATION – no yes
720-680 T-Mobile T-MOBILE USA, INC. 2020-06-04 yes yes
720-684 Lumen LEVEL 3 COMMUNICATIONS, LLC - CO – yes yes
720-698 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2022-03-15 yes yes
720-713 Onvoy ONVOY, LLC - CO 2019-08-16 yes yes
720-714 Onvoy ONVOY, LLC - CO 2020-08-24 yes yes
720-718 Lumen QWEST CORPORATION 2016-12-19 yes yes
720-727 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2018-06-12 yes yes
720-731 Lumen LEVEL 3 COMMUNICATIONS, LLC - CO 2019-01-04 yes yes
720-743 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2020-09-21 yes yes
720-745 Lumen LEVEL 3 COMMUNICATIONS, LLC - CO 2015-04-17 yes yes
720-759 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2016-08-10 yes yes
720-781 T-Mobile T-MOBILE USA, INC. 2020-11-24 yes yes
720-804 T-Mobile T-MOBILE USA, INC. 2021-03-05 yes yes
720-815 Comcast COMCAST IP PHONE, LLC 2017-09-01 yes yes
720-818 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2017-09-01 yes yes
720-821 Onvoy ONVOY, LLC - CO 2021-01-06 yes yes
720-853 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2021-10-25 yes yes
720-864 Lumen QWEST CORPORATION – yes yes
720-871 T-Mobile T-MOBILE USA, INC. 2021-11-18 yes yes
720-899 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 2014-11-10 yes yes
720-927 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2019-03-27 yes yes
720-964 T-Mobile T-MOBILE USA, INC. 2022-09-20 yes yes
720-970 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2024-04-03 yes yes
720-986 Bandwidth BANDWIDTH.COM CLEC, LLC - CO 2022-10-18 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
BANDWIDTH.COM CLEC, LLC - CO Bandwidth 8 20.5%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO Verizon 6 15.4%
T-MOBILE USA, INC. T-Mobile 6 15.4%
ONVOY, LLC - CO Onvoy 5 12.8%
LEVEL 3 COMMUNICATIONS, LLC - CO Lumen 4 10.3%
QWEST CORPORATION Lumen 4 10.3%
NEW CINGULAR WIRELESS PCS, LLC AT&T 3 7.7%
TELNYX LLC Telnyx 1 2.6%
VONAGE AMERICA LLC Vonage 1 2.6%
COMCAST IP PHONE, LLC Comcast 1 2.6%

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 LONGMONT in area code 720?

39 blocks: 204, 340, 378, 438, 442, 453, 487, 491, 494, 526, 534, 552 and 27 more, all listed in the table above.

Which carriers have numbers in LONGMONT?

BANDWIDTH.COM CLEC, LLC - CO (8 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO (6 blocks), T-MOBILE USA, INC. (6 blocks), ONVOY, LLC - CO (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - CO (4 blocks), QWEST CORPORATION (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LONGMONT 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 720

All 785 prefixes in 720