Local Calling Guide
Area code/prefix search
NPA: 231
[Rate centres in NPA 231]
[Dial plan for NPA 231]
NXX: 437
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 231-437
| A |
Charlevoix |
MI |
GDRPMIBL31Z |
2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
348 |
|
|
|
| 231-437
| 0 |
Charlevoix |
MI |
|
2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
348 |
|
|
|
| 231-437
| 1 |
Charlevoix |
MI |
|
543C ONVOY, LLCV - MI |
348 |
|
2016-03-21 |
|
| 231-437
| 2 |
Charlevoix |
MI |
|
516C AT&T CORP. |
348 |
|
2011-08-23 |
|
| 231-437
| 3 |
Charlevoix |
MI |
|
792K CHARTER IP ENABLED SERVICES, LLC |
348 |
|
2007-02-25 |
|
| 231-437
| 4 |
Charlevoix |
MI |
|
770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI |
348 |
|
2007-12-11 |
|
| 231-437
| 5 |
Charlevoix |
MI |
|
543C ONVOY, LLCV - MI |
348 |
|
2013-04-01 |
|
| 231-437
| 6 |
Charlevoix |
MI |
|
792K CHARTER IP ENABLED SERVICES, LLC |
348 |
|
2014-08-09 |
|
| 231-437
| 7 |
Charlevoix |
MI |
|
991E BANDWIDTH.COM CLEC, LLC - MI |
348 |
|
2014-09-01 |
|
| 231-437
| 8 |
Charlevoix |
MI |
|
543C ONVOY, LLCV - MI |
348 |
|
2020-11-14 |
|
| 231-437
| 9 |
Charlevoix |
MI |
|
543C ONVOY, LLCV - MI |
348 |
|
2020-11-14 |
|
Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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