Local Calling Guide
Area code/prefix search
NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]
NXX: 721
NPA-NXX | BLOCK | Rate Centre | Region | Switch | OCN | LATA | LIR | Eff date | Disc date |
---|---|---|---|---|---|---|---|---|---|
231-721 | A | Hart | MI | GDRPMIBLX8Z | 2550 123 NET, INC. | 348 | |||
231-721 | 0 | Hart | MI | 2550 123 NET, INC. | 348 | ||||
231-721 | 1 | Hart | MI | 6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 348 | 2021-04-20 | |||
231-721 | 2 | Hart | MI | 543C ONVOY, LLC - MI | 348 | 2020-11-20 | |||
231-721 | 3 | Hart | MI | 543C ONVOY, LLC - MI | 348 | 2020-11-20 | |||
231-721 | 5 | Hart | MI | 6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 348 | 2012-09-24 | |||
231-721 | 7 | Hart | MI | 7575 CENTURYLINK COMMUNICATIONS LLC | 348 | 2017-10-04 | |||
231-721 | 8 | Hart | MI | 6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 348 | 2021-04-20 | |||
231-721 | 9 | Hart | MI | 6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 348 | 2021-04-20 |
Last updated: Sun, 04 Apr 2021 19:28:27 UTC
Sponsored by: ISP Telecom
Like this site? We accept donations via PayPal.