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

COLDWATER prefixes in area code 517

NANPA records 14 assigned NXX blocks to rate center COLDWATER in area code 517, 2.3% 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. 11 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (2), FRONTIER NORTH, INC. - MI (2), NEW CINGULAR WIRELESS PCS, LLC - IL (2). The earliest assignment on record here is 2001-11-13 and the most recent 2022-02-28. 8 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 419, 567, 620, 662 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 2.3% of 517
11 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
517-227 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2003-04-29 yes yes
517-278 Frontier FRONTIER NORTH, INC. - MI – no yes
517-279 Frontier FRONTIER NORTH, INC. - MI – no yes
517-309 Spok SPOK, INC. – no yes
517-317 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
517-462 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2004-04-19 yes yes
517-617 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
517-677 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2002-09-03 yes yes
517-736 123.NET, LLC 2001-12-27 yes yes
517-746 TON80 COMMUNICATIONS, LLC 2022-02-28 yes yes
517-753 INTERACTIVE SERVICES NETWORK, INC. 2001-11-13 no yes
517-781 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI 2002-08-19 yes yes
517-924 Charter CHARTER IP ENABLED SERVICES, LLC 2007-01-04 yes yes
517-933 ACD TELECOM, INC. - MI – 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI Verizon 2 14.3%
FRONTIER NORTH, INC. - MI Frontier 2 14.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 14.3%
SPOK, INC. Spok 1 7.1%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 1 7.1%
123.NET, LLC – 1 7.1%
TON80 COMMUNICATIONS, LLC – 1 7.1%
INTERACTIVE SERVICES NETWORK, INC. – 1 7.1%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 1 7.1%
CHARTER IP ENABLED SERVICES, LLC Charter 1 7.1%
ACD TELECOM, INC. - MI – 1 7.1%

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 COLDWATER in area code 517?

14 blocks: 227, 278, 279, 309, 317, 462, 617, 677, 736, 746, 753, 781 and 2 more, all listed in the table above.

Which carriers have numbers in COLDWATER?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (2 blocks), FRONTIER NORTH, INC. - MI (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), SPOK, INC. (1 block), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (1 block), 123.NET, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is COLDWATER 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