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

HOWELL prefixes in area code 517

NANPA records 27 assigned NXX blocks to rate center HOWELL in area code 517, 4.4% of the 616 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. 13 holders hold those blocks, the largest being MICHIGAN BELL TEL CO (5), NEW CINGULAR WIRELESS PCS, LLC - IL (4), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (3). The earliest assignment on record here is 2001-05-02 and the most recent 2024-01-17. 20 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 435 – overlay codes cover the same geography, so a rate center is served by all of them.

27 assigned blocks – 4.4% of 517
13 holders of record
20 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
517-225 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2015-11-16 yes yes
517-234 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2016-11-08 yes yes
517-258 Bandwidth BANDWIDTH.COM CLEC, LLC - MI 2012-03-12 yes yes
517-273 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI 2017-07-26 yes yes
517-292 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
517-295 Bandwidth BANDWIDTH.COM CLEC, LLC - MI 2013-03-08 yes yes
517-304 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
517-338 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
517-376 Comcast COMCAST IP PHONE, LLC – yes yes
517-380 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2024-01-17 yes yes
517-404 T-Mobile METROPCS, INC. – yes yes
517-518 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-08-23 yes yes
517-537 Onvoy ONVOY, LLCV - MI 2021-05-19 yes yes
517-540 AT&T MICHIGAN BELL TEL CO – yes yes
517-545 AT&T MICHIGAN BELL TEL CO – no yes
517-546 AT&T MICHIGAN BELL TEL CO – no yes
517-548 AT&T MICHIGAN BELL TEL CO – no yes
517-552 AT&T MICHIGAN BELL TEL CO – no yes
517-553 T-Mobile METROPCS, INC. 2021-09-29 yes yes
517-571 Spok SPOK, INC. – no yes
517-579 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
517-586 Windstream PAETEC ITEL, LLC – yes yes
517-618 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
517-672 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2002-06-26 yes yes
517-798 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2010-08-06 yes yes
517-861 T-Mobile METROPCS, INC. 2001-05-02 yes yes
517-947 INTERACTIVE SERVICES NETWORK, INC. – no 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
MICHIGAN BELL TEL CO AT&T 5 18.5%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 4 14.8%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 3 11.1%
METROPCS, INC. T-Mobile 3 11.1%
BANDWIDTH.COM CLEC, LLC - MI Bandwidth 2 7.4%
TELEPORT COMMUNICATIONS AMERICA, LLC - MI AT&T 2 7.4%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 2 7.4%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI Verizon 1 3.7%
COMCAST IP PHONE, LLC Comcast 1 3.7%
ONVOY, LLCV - MI Onvoy 1 3.7%
SPOK, INC. Spok 1 3.7%
PAETEC ITEL, LLC Windstream 1 3.7%
INTERACTIVE SERVICES NETWORK, INC. – 1 3.7%

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 HOWELL in area code 517?

27 blocks: 225, 234, 258, 273, 292, 295, 304, 338, 376, 380, 404, 518 and 15 more, all listed in the table above.

Which carriers have numbers in HOWELL?

MICHIGAN BELL TEL CO (5 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (4 blocks), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (3 blocks), METROPCS, INC. (3 blocks), BANDWIDTH.COM CLEC, LLC - MI (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HOWELL 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 517

All 616 prefixes in 517