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

LUDINGTON prefixes in area code 231

NANPA records 14 assigned NXX blocks to rate center LUDINGTON in area code 231, 2.4% of the 572 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. 9 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3), 123.NET, LLC (2), FRONTIER NORTH, INC. - MI (2). The earliest assignment on record here is 2002-05-23 and the most recent 2018-12-31. 7 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

14 assigned blocks – 2.4% of 231
9 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
231-233 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2004-08-30 no yes
231-239 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2004-04-28 yes yes
231-261 PENINSULA FIBER NETWORK, LLC - MI 2018-12-31 yes yes
231-316 INTERACTIVE SERVICES NETWORK, INC. – no yes
231-336 Spok SPOK, INC. – no yes
231-425 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC – yes yes
231-480 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI 2002-05-23 yes yes
231-583 123.NET, LLC 2002-08-27 yes yes
231-690 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2002-07-19 no yes
231-813 123.NET, LLC – no yes
231-843 Frontier FRONTIER NORTH, INC. - MI – no yes
231-845 Frontier FRONTIER NORTH, INC. - MI – no yes
231-852 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
231-907 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-09-03 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI Verizon 3 21.4%
123.NET, LLC – 2 14.3%
FRONTIER NORTH, INC. - MI Frontier 2 14.3%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 2 14.3%
PENINSULA FIBER NETWORK, LLC - MI – 1 7.1%
INTERACTIVE SERVICES NETWORK, INC. – 1 7.1%
SPOK, INC. Spok 1 7.1%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 1 7.1%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 1 7.1%

Frequently asked

Which prefixes belong to LUDINGTON in area code 231?

14 blocks: 233, 239, 261, 316, 336, 425, 480, 583, 690, 813, 843, 845 and 2 more, all listed in the table above.

Which carriers have numbers in LUDINGTON?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3 blocks), 123.NET, LLC (2 blocks), FRONTIER NORTH, INC. - MI (2 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), PENINSULA FIBER NETWORK, LLC - MI (1 block), INTERACTIVE SERVICES NETWORK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is LUDINGTON 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 231

All 572 prefixes in 231