Local Calling Guide
Area code/prefix search
NPA: 231
[Rate centres in NPA 231]
[Dial plan for NPA 231]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 231-374
| A |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
|
|
| 231-374
| 0 |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2023-07-08 |
|
| 231-374
| 1 |
Shelby |
MI |
MSKGMIXKQMD |
624H ONVOY SPECTRUM, LLC |
348 |
|
2021-11-22 |
|
| 231-374
| 2 |
Shelby |
MI |
MSKGMIXKQMD |
624H ONVOY SPECTRUM, LLC |
348 |
|
2021-11-22 |
|
| 231-374
| 4 |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2021-08-15 |
|
| 231-374
| 5 |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2021-08-15 |
|
| 231-374
| 6 |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2023-01-04 |
|
| 231-374
| 7 |
Shelby |
MI |
MSKGMIXKQMD |
624H ONVOY SPECTRUM, LLC |
348 |
|
2021-08-16 |
|
| 231-374
| 8 |
Shelby |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2022-03-04 |
|
| 231-374
| 9 |
Shelby |
MI |
MSKGMIXKX1X |
543C ONVOY, LLCV - MI |
348 |
|
2023-08-12 |
|
| 231-375
| A |
Muskegon |
MI |
GDRQMIBODMD |
6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
348 |
|
|
|
| 231-375
| 0 |
Muskegon |
MI |
GDRPMIBL40Z |
318J COMCAST IP PHONE, LLC |
348 |
|
2015-11-09 |
|
| 231-375
| 1 |
Muskegon |
MI |
GDRQMIBODMD |
6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
348 |
|
2018-02-04 |
|
| 231-375
| 2 |
Muskegon |
MI |
GDRQMIBODS0 |
7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI |
348 |
|
2014-06-13 |
|
| 231-375
| 3 |
Muskegon |
MI |
GDRPMIBL31Z |
5562 METROPCS, INC. |
348 |
|
2014-03-07 |
|
| 231-375
| 4 |
Muskegon |
MI |
GDRPMIBL31Z |
5562 METROPCS, INC. |
348 |
|
2014-03-07 |
|
| 231-375
| 5 |
Muskegon |
MI |
GDRPMIBL40Z |
318J COMCAST IP PHONE, LLC |
348 |
|
2014-02-15 |
|
| 231-375
| 6 |
Muskegon |
MI |
TRCYMIMNWMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
348 |
|
2015-07-30 |
|
| 231-375
| 7 |
Muskegon |
MI |
GDRQMIBODMD |
6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
348 |
|
2014-08-14 |
|
| 231-375
| 8 |
Muskegon |
MI |
GDRPMIBL40Z |
318J COMCAST IP PHONE, LLC |
348 |
|
2015-03-27 |
|
| 231-375
| 9 |
Muskegon |
MI |
GDRQMIBODMD |
6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI |
348 |
|
2014-09-01 |
|
| 231-376
| A |
Twin Lake |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
|
|
| 231-376
| 0 |
Twin Lake |
MI |
WYNGMIKAGT2 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
348 |
|
2024-12-09 |
|
| 231-376
| 6 |
Twin Lake |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2021-09-03 |
|
| 231-376
| 7 |
Twin Lake |
MI |
|
145J TERRA NOVA TELECOM INC. |
348 |
|
2025-07-12 |
|
| 231-377
| A |
Clam River |
MI |
CLRVMIXHRS0 |
0695 FRONTIER NORTH, INC. - MI |
348 |
|
|
|
| 231-377
| 0 |
Clam River |
MI |
GDRPMIBLXTZ |
3535 ACD TELECOM, INC. - MI |
348 |
|
2004-10-22 |
|
| 231-377
| 1 |
Clam River |
MI |
GDRPMIQLX5Y |
6120 LEVEL 3 COMMUNICATIONS, LLC - MI |
348 |
|
2008-12-23 |
|
| 231-377
| 2 |
Clam River |
MI |
|
792K CHARTER IP ENABLED SERVICES, LLC |
348 |
|
2007-02-25 |
|
| 231-377
| 3 |
Clam River |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2015-11-05 |
|
| 231-377
| 4 |
Clam River |
MI |
CLRVMIXHRS0 |
0695 FRONTIER NORTH, INC. - MI |
348 |
|
|
|
| 231-377
| 5 |
Clam River |
MI |
TRCYMIMNWMD |
508J CENTURYLINK COMMUNICATIONS, LLC |
348 |
|
2015-09-16 |
|
| 231-377
| 6 |
Clam River |
MI |
CLRVMIXHRS0 |
0695 FRONTIER NORTH, INC. - MI |
348 |
|
|
|
| 231-377
| 7 |
Clam River |
MI |
CLRVMIXHRS0 |
0695 FRONTIER NORTH, INC. - MI |
348 |
|
|
|
| 231-377
| 8 |
Clam River |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2013-04-01 |
|
| 231-377
| 9 |
Clam River |
MI |
CLRVMIXHRS0 |
0695 FRONTIER NORTH, INC. - MI |
348 |
|
|
|
| 231-378
| A |
Copemish Thompsonville |
MI |
MSCKMIXIRS0 |
0704 ACE TEL. CO. OF MICHIGAN, INC. |
348 |
|
|
|
| 231-379
| A |
Onekama |
MI |
GDRPMIBL00Z |
991E BANDWIDTH.COM CLEC, LLC - MI |
348 |
|
|
|
| 231-379
| 0 |
Onekama |
MI |
GDRPMIBL00Z |
991E BANDWIDTH.COM CLEC, LLC - MI |
348 |
|
2021-10-29 |
|
| 231-379
| 1 |
Onekama |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2023-08-12 |
|
| 231-379
| 2 |
Onekama |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2022-12-29 |
|
| 231-379
| 9 |
Onekama |
MI |
BRSPMI09FMD |
145J TERRA NOVA TELECOM INC. |
348 |
|
2024-02-14 |
|
| 231-380
| A |
Newaygo |
MI |
GDRPMIBL31Z |
2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
348 |
|
|
|
| 231-380
| 0 |
Newaygo |
MI |
BRSPMI09FMD |
145J TERRA NOVA TELECOM INC. |
348 |
|
2024-02-14 |
|
| 231-380
| 1 |
Newaygo |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2023-08-12 |
|
| 231-380
| 3 |
Newaygo |
MI |
GDRPMIBL04Z |
543C ONVOY, LLCV - MI |
348 |
|
2022-04-17 |
|
| 231-380
| 8 |
Newaygo |
MI |
GDRPMIBL31Z |
2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
348 |
|
2022-02-24 |
|
| 231-380
| 9 |
Newaygo |
MI |
GDRPMIBL31Z |
2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC |
348 |
|
2022-02-24 |
|
| 231-381
| A |
White Cloud |
MI |
|
792K CHARTER IP ENABLED SERVICES, LLC |
348 |
|
|
|
| 231-381
| 0 |
White Cloud |
MI |
|
792K CHARTER IP ENABLED SERVICES, LLC |
348 |
|
2021-06-27 |
|
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Last updated: Thu, 05 Feb 2026 23:41:55 UTC
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