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

PLYMOUTH prefixes in area code 734

NANPA records 44 assigned NXX blocks to rate center PLYMOUTH in area code 734, 6.3% of the 701 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 (17), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (4), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (4). The earliest assignment on record here is 2001-04-02 and the most recent 2026-09-25. 33 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 207, 209, 252, 272 – overlay codes cover the same geography, so a rate center is served by all of them.

44 assigned blocks – 6.3% of 734
13 holders of record
33 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
734-207 AT&T MICHIGAN BELL TEL CO – no yes
734-228 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2016-01-28 yes yes
734-233 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2004-08-23 yes yes
734-254 AT&T MICHIGAN BELL TEL CO – yes yes
734-259 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
734-335 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
734-354 AT&T MICHIGAN BELL TEL CO – no yes
734-357 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
734-359 Comcast COMCAST IP PHONE, LLC 2017-02-07 yes yes
734-386 AT&T MICHIGAN BELL TEL CO 2005-12-14 yes yes
734-392 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
734-404 Windstream PAETEC ITEL, LLC – yes yes
734-414 AT&T MICHIGAN BELL TEL CO – yes yes
734-416 AT&T MICHIGAN BELL TEL CO – no yes
734-420 AT&T MICHIGAN BELL TEL CO – yes yes
734-446 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
734-451 AT&T MICHIGAN BELL TEL CO – no yes
734-453 AT&T MICHIGAN BELL TEL CO – no yes
734-454 AT&T MICHIGAN BELL TEL CO – no yes
734-455 AT&T MICHIGAN BELL TEL CO – no yes
734-456 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
734-459 AT&T MICHIGAN BELL TEL CO – no yes
734-463 Onvoy ONVOY, LLCV - MI 2020-11-06 yes yes
734-468 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – no yes
734-564 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC – yes yes
734-566 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
734-582 AT&T MICHIGAN BELL TEL CO – yes yes
734-617 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2026-09-25 yes no
734-637 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2001-04-02 yes yes
734-656 Windstream PAETEC ITEL, LLC – yes yes
734-667 Comcast COMCAST IP PHONE, LLC – yes yes
734-737 AT&T MICHIGAN BELL TEL CO – yes yes
734-738 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
734-781 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
734-844 AT&T MICHIGAN BELL TEL CO – yes yes
734-862 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
734-891 T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2002-08-13 yes yes
734-892 Onvoy ONVOY, LLCV - MI 2014-12-19 yes yes
734-927 Bandwidth BANDWIDTH.COM CLEC, LLC - MI – yes yes
734-928 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
734-979 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI – yes yes
734-981 AT&T MICHIGAN BELL TEL CO – no yes
734-983 AT&T MICHIGAN BELL TEL CO – yes yes
734-987 TON80 COMMUNICATIONS, LLC 2022-03-24 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
MICHIGAN BELL TEL CO AT&T 17 38.6%
TELEPORT COMMUNICATIONS AMERICA, LLC - MI AT&T 4 9.1%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI Verizon 4 9.1%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 3 6.8%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 3 6.8%
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC T-Mobile 3 6.8%
COMCAST IP PHONE, LLC Comcast 2 4.5%
PAETEC ITEL, LLC Windstream 2 4.5%
ONVOY, LLCV - MI Onvoy 2 4.5%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 2.3%
BANDWIDTH.COM CLEC, LLC - MI Bandwidth 1 2.3%
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI Verizon 1 2.3%
TON80 COMMUNICATIONS, LLC – 1 2.3%

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 PLYMOUTH in area code 734?

44 blocks: 207, 228, 233, 254, 259, 335, 354, 357, 359, 386, 392, 404 and 32 more, all listed in the table above.

Which carriers have numbers in PLYMOUTH?

MICHIGAN BELL TEL CO (17 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (4 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (3 blocks), LEVEL 3 COMMUNICATIONS, LLC - MI (3 blocks), OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (3 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is PLYMOUTH 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 734

All 701 prefixes in 734