CADILLAC prefixes in area code 231
NANPA records 21 assigned NXX blocks to rate center CADILLAC in area code 231, 3.7% 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. 11 holders hold those blocks, the largest being OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (4), NEW CINGULAR WIRELESS PCS, LLC - IL (3), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3). The earliest assignment on record here is 2001-02-05 and the most recent 2021-10-29. 12 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 231-253 | T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2018-11-08 | yes | yes |
| 231-281 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2020-11-03 | yes | yes |
| 231-285 | T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2020-01-09 | yes | yes |
| 231-306 | INTERACTIVE SERVICES NETWORK, INC. | – | no | yes |
| 231-396 | Onvoy ONVOY, LLCV - MI | 2021-10-29 | yes | yes |
| 231-429 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 2002-12-05 | no | yes |
| 231-444 | Onvoy ONVOY, LLCV - MI | 2015-08-24 | yes | yes |
| 231-468 | T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2001-02-05 | yes | yes |
| 231-514 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 231-577 | Lumen LEVEL 3 COMMUNICATIONS, LLC - MI | 2002-05-14 | yes | yes |
| 231-593 | Spok SPOK, INC. | – | no | yes |
| 231-775 | AT&T MICHIGAN BELL TEL CO | – | no | yes |
| 231-779 | AT&T MICHIGAN BELL TEL CO | – | no | yes |
| 231-842 | 123.NET, LLC | 2002-08-27 | no | yes |
| 231-846 | T-Mobile OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | – | yes | yes |
| 231-876 | AT&T MICHIGAN BELL TEL CO | – | yes | yes |
| 231-878 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 2002-07-19 | no | yes |
| 231-884 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | – | yes | yes |
| 231-920 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | – | no | yes |
| 231-942 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 2001-06-18 | yes | yes |
| 231-968 | Bandwidth BANDWIDTH.COM CLEC, LLC - MI | 2021-09-16 | 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 |
|---|---|---|---|
| OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | T-Mobile | 4 | 19% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 3 | 14.3% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | Verizon | 3 | 14.3% |
| MICHIGAN BELL TEL CO | AT&T | 3 | 14.3% |
| ONVOY, LLCV - MI | Onvoy | 2 | 9.5% |
| INTERACTIVE SERVICES NETWORK, INC. | – | 1 | 4.8% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 4.8% |
| LEVEL 3 COMMUNICATIONS, LLC - MI | Lumen | 1 | 4.8% |
| SPOK, INC. | Spok | 1 | 4.8% |
| 123.NET, LLC | – | 1 | 4.8% |
| BANDWIDTH.COM CLEC, LLC - MI | Bandwidth | 1 | 4.8% |
Frequently asked
Which prefixes belong to CADILLAC in area code 231?
21 blocks: 253, 281, 285, 306, 396, 429, 444, 468, 514, 577, 593, 775 and 9 more, all listed in the table above.
Which carriers have numbers in CADILLAC?
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (3 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI (3 blocks), MICHIGAN BELL TEL CO (3 blocks), ONVOY, LLCV - MI (2 blocks), INTERACTIVE SERVICES NETWORK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is CADILLAC 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.