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

FARMINGTON prefixes in area code 248

NANPA records 47 assigned NXX blocks to rate center FARMINGTON in area code 248, 6.0% of the 784 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. 12 holders hold those blocks, the largest being MICHIGAN BELL TEL CO (17), NEW CINGULAR WIRELESS PCS, LLC - IL (8), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (5). The earliest assignment on record here is 2001-03-26 and the most recent 2023-12-15. 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, 235, 270 – overlay codes cover the same geography, so a rate center is served by all of them.

47 assigned blocks – 6% of 248
12 holders of record
33 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
248-306 Windstream PAETEC ITEL, LLC – yes yes
248-324 AT&T MICHIGAN BELL TEL CO – yes yes
248-381 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
248-426 AT&T MICHIGAN BELL TEL CO – no yes
248-427 AT&T MICHIGAN BELL TEL CO – no yes
248-442 AT&T MICHIGAN BELL TEL CO – no yes
248-471 AT&T MICHIGAN BELL TEL CO – no yes
248-473 AT&T MICHIGAN BELL TEL CO – yes yes
248-474 AT&T MICHIGAN BELL TEL CO – no yes
248-476 AT&T MICHIGAN BELL TEL CO – no yes
248-477 AT&T MICHIGAN BELL TEL CO – no yes
248-478 AT&T MICHIGAN BELL TEL CO – no yes
248-479 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
248-482 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
248-488 AT&T MICHIGAN BELL TEL CO – yes yes
248-489 AT&T MICHIGAN BELL TEL CO – yes yes
248-516 AT&T AT&T ENTERPRISES, LLC 2014-09-23 yes yes
248-517 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-06-13 yes yes
248-522 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
248-523 American Messaging AMERICAN MESSAGING SERVICES, LLC – no yes
248-536 Windstream PAETEC ITEL, LLC – yes yes
248-553 AT&T MICHIGAN BELL TEL CO – no yes
248-579 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
248-615 AT&T MICHIGAN BELL TEL CO – no yes
248-699 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
248-715 INTERACTIVE SERVICES NETWORK, INC. – no yes
248-741 INTERACTIVE SERVICES NETWORK, INC. – no yes
248-755 T-Mobile METROPCS, INC. – yes yes
248-772 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL – yes yes
248-848 AT&T MICHIGAN BELL TEL CO – no yes
248-871 Windstream PAETEC ITEL, LLC – yes yes
248-873 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2019-06-27 yes yes
248-876 Lumen LEVEL 3 COMMUNICATIONS, LLC - MI – yes yes
248-888 AT&T MICHIGAN BELL TEL CO – yes yes
248-893 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
248-907 Bandwidth BANDWIDTH.COM CLEC, LLC - MI 2016-06-28 yes yes
248-919 Onvoy ONVOY, LLCV - MI – yes yes
248-939 T-Mobile METROPCS, INC. 2001-03-26 yes yes
248-947 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-12-15 yes yes
248-949 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2015-09-02 yes yes
248-954 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2016-11-03 yes yes
248-957 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
248-984 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2023-08-03 yes yes
248-986 AT&T NEW CINGULAR WIRELESS PCS, LLC - IL 2014-09-10 yes yes
248-987 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - MI – yes yes
248-991 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI – yes yes
248-994 AT&T MICHIGAN BELL TEL CO – 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 36.2%
NEW CINGULAR WIRELESS PCS, LLC - IL AT&T 8 17%
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI Verizon 5 10.6%
LEVEL 3 COMMUNICATIONS, LLC - MI Lumen 4 8.5%
PAETEC ITEL, LLC Windstream 3 6.4%
TELEPORT COMMUNICATIONS AMERICA, LLC - MI AT&T 2 4.3%
INTERACTIVE SERVICES NETWORK, INC. – 2 4.3%
METROPCS, INC. T-Mobile 2 4.3%
AT&T ENTERPRISES, LLC AT&T 1 2.1%
AMERICAN MESSAGING SERVICES, LLC American Messaging 1 2.1%
BANDWIDTH.COM CLEC, LLC - MI Bandwidth 1 2.1%
ONVOY, LLCV - MI Onvoy 1 2.1%

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 FARMINGTON in area code 248?

47 blocks: 306, 324, 381, 426, 427, 442, 471, 473, 474, 476, 477, 478 and 35 more, all listed in the table above.

Which carriers have numbers in FARMINGTON?

MICHIGAN BELL TEL CO (17 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (8 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI (5 blocks), LEVEL 3 COMMUNICATIONS, LLC - MI (4 blocks), PAETEC ITEL, LLC (3 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - MI (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is FARMINGTON 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 248

All 784 prefixes in 248