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

WESTBRANCH prefixes in area code 989

NANPA records 10 assigned NXX blocks to rate center WESTBRANCH in area code 989, 1.4% of the 723 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. 8 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC - IL (2), MICHIGAN BELL TEL CO (2), PAETEC ITEL, LLC (1). The earliest assignment on record here is 2001-11-01 and the most recent 2005-08-05. 7 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 319 – overlay codes cover the same geography, so a rate center is served by all of them.

10 assigned blocks – 1.4% of 989
8 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
989-216 Windstream PAETEC ITEL, LLC – yes yes
989-312 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
989-343 AT&T MICHIGAN BELL TEL CO – yes yes
989-345 AT&T MICHIGAN BELL TEL CO – no yes
989-516 INTERACTIVE SERVICES NETWORK, INC. 2001-11-01 no yes
989-701 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
989-726 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI 2002-05-14 yes yes
989-787 CYNERGYCOMM.NET, INC. - MI 2005-08-05 yes yes
989-896 123.NET, LLC 2002-08-12 no yes
989-942 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC – 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 2 20%
MICHIGAN BELL TEL CO AT&T 2 20%
PAETEC ITEL, LLC Windstream 1 10%
INTERACTIVE SERVICES NETWORK, INC. – 1 10%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 1 10%
CYNERGYCOMM.NET, INC. - MI – 1 10%
123.NET, LLC – 1 10%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 1 10%

Frequently asked

Which prefixes belong to WESTBRANCH in area code 989?

10 blocks: 216, 312, 343, 345, 516, 701, 726, 787, 896, 942. The table above gives the holder of each.

Which carriers have numbers in WESTBRANCH?

NEW CINGULAR WIRELESS PCS, LLC - IL (2 blocks), MICHIGAN BELL TEL CO (2 blocks), PAETEC ITEL, LLC (1 block), INTERACTIVE SERVICES NETWORK, INC. (1 block), LEVEL 3 COMMUNICATIONS, LLC - MI (1 block), CYNERGYCOMM.NET, INC. - MI (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is WESTBRANCH 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 989

All 723 prefixes in 989