MACOMB prefixes in area code 309
NANPA records 23 assigned NXX blocks to rate center MACOMB in area code 309, 2.9% of the 786 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. 15 holders hold those blocks, the largest being FRONTIER NORTH, INC. - IL (5), NUSO, LLC (2), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (2). The earliest assignment on record here is 2003-09-12 and the most recent 2025-07-30. 20 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 315, 680 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 309-209 | NUSO, LLC | 2013-03-13 | yes | yes |
| 309-252 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | – | yes | yes |
| 309-255 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | – | no | yes |
| 309-259 | Charter ONVOY SPECTRUM, LLC | – | yes | yes |
| 309-295 | Frontier FRONTIER NORTH, INC. - IL | – | yes | yes |
| 309-298 | Frontier FRONTIER NORTH, INC. - IL | – | no | yes |
| 309-313 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | – | yes | yes |
| 309-318 | T-Mobile METROPCS, INC. | 2003-09-12 | yes | yes |
| 309-331 | UNITED STATES CELLULAR - IL | – | yes | yes |
| 309-333 | UNITED STATES CELLULAR - IL | – | yes | yes |
| 309-421 | Comcast COMCAST IP PHONE, LLC | 2008-05-27 | yes | yes |
| 309-544 | SKYE TELECOM LLC DBA SKYETEL | – | yes | yes |
| 309-575 | MTC COMMUNICATIONS, INC. - IL | 2010-12-01 | no | yes |
| 309-588 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IL | 2004-07-21 | yes | yes |
| 309-730 | NUSO, LLC | 2024-10-22 | yes | yes |
| 309-731 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IL | 2005-03-08 | yes | yes |
| 309-833 | Frontier FRONTIER NORTH, INC. - IL | – | yes | yes |
| 309-836 | Frontier FRONTIER NORTH, INC. - IL | – | yes | yes |
| 309-837 | Frontier FRONTIER NORTH, INC. - IL | – | yes | yes |
| 309-864 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 2009-06-10 | yes | yes |
| 309-954 | T-Mobile T-MOBILE USA, INC. | 2016-05-09 | yes | yes |
| 309-978 | WAVENATION, LLC | 2025-07-23 | yes | yes |
| 309-980 | Bandwidth BANDWIDTH.COM CLEC, LLC - IL | 2025-07-30 | 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
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| FRONTIER NORTH, INC. - IL | Frontier | 5 | 21.7% |
| NUSO, LLC | – | 2 | 8.7% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Verizon | 2 | 8.7% |
| UNITED STATES CELLULAR - IL | – | 2 | 8.7% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | Lumen | 2 | 8.7% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 4.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Verizon | 1 | 4.3% |
| METROPCS, INC. | T-Mobile | 1 | 4.3% |
| COMCAST IP PHONE, LLC | Comcast | 1 | 4.3% |
| SKYE TELECOM LLC DBA SKYETEL | – | 1 | 4.3% |
| MTC COMMUNICATIONS, INC. - IL | – | 1 | 4.3% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | AT&T | 1 | 4.3% |
| T-MOBILE USA, INC. | T-Mobile | 1 | 4.3% |
| WAVENATION, LLC | – | 1 | 4.3% |
| BANDWIDTH.COM CLEC, LLC - IL | Bandwidth | 1 | 4.3% |
Frequently asked
Which prefixes belong to MACOMB in area code 309?
23 blocks: 209, 252, 255, 259, 295, 298, 313, 318, 331, 333, 421, 544 and 11 more, all listed in the table above.
Which carriers have numbers in MACOMB?
FRONTIER NORTH, INC. - IL (5 blocks), NUSO, LLC (2 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (2 blocks), UNITED STATES CELLULAR - IL (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - IL (2 blocks), ONVOY SPECTRUM, 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 MACOMB 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.