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

MANISTEE prefixes in area code 231

NANPA records 12 assigned NXX blocks to rate center MANISTEE in area code 231, 2.1% 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. 7 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (4), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (2), MICHIGAN BELL TEL CO (2). The earliest assignment on record here is 2002-08-27 and the most recent 2022-08-12. 8 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

12 assigned blocks – 2.1% of 231
7 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
231-284 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2021-03-01 yes yes
231-299 T-Mobile METROPCS, INC. 2011-12-28 yes yes
231-309 INTERACTIVE SERVICES NETWORK, INC. – no yes
231-397 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2021-11-03 yes yes
231-398 AT&T MICHIGAN BELL TEL CO – yes yes
231-410 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2022-08-12 yes yes
231-488 123.NET, LLC 2002-08-27 no yes
231-510 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – no yes
231-655 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2014-12-19 yes yes
231-723 AT&T MICHIGAN BELL TEL CO – no yes
231-794 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2002-08-30 yes yes
231-887 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – 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
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 4 33.3%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 2 16.7%
MICHIGAN BELL TEL CO AT&T 2 16.7%
METROPCS, INC. T-Mobile 1 8.3%
INTERACTIVE SERVICES NETWORK, INC. – 1 8.3%
123.NET, LLC – 1 8.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI Verizon 1 8.3%

Frequently asked

Which prefixes belong to MANISTEE in area code 231?

12 blocks: 284, 299, 309, 397, 398, 410, 488, 510, 655, 723, 794, 887. The table above gives the holder of each.

Which carriers have numbers in MANISTEE?

NEW CINGULAR WIRELESS PCS, LLC - IL (4 blocks), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (2 blocks), MICHIGAN BELL TEL CO (2 blocks), METROPCS, INC. (1 block), INTERACTIVE SERVICES NETWORK, INC. (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 MANISTEE 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