Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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
231-577 0 Cadillac MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2020-09-28   
231-577 1 Cadillac MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2005-06-13   
231-577 2 Cadillac MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2007-06-16   
231-577 3 Cadillac MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-07-30   
231-577 4 Cadillac MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-577 5 Cadillac MI GDRQMIBODS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 348   2005-09-03   
231-577 6 Cadillac MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2010-11-04   
231-577 7 Cadillac MI GDRPMIBL54Z  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 348   2004-02-02   
231-577 8 Cadillac MI GDRQMIBODMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2011-05-14   
231-577 9 Cadillac MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2011-06-12   
231-578 A Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 0 Muskegon MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 1 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 2 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 3 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 4 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 5 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 6 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 7 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 8 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-578 9 Muskegon MI GDRPMIBLXDZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-580 A Big Rapids MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-580 0 Big Rapids MI GDRPMIBL54Z  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 348   2003-11-25   
231-580 1 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-580 2 Big Rapids MI BRSPMI096MD  145J TERRA NOVA TELECOM INC. 348   2022-12-05   
231-580 3 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-580 4 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2011-01-28   
231-580 5 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2010-04-17   
231-580 6 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-580 7 Big Rapids MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2011-04-10   
231-580 8 Big Rapids MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2010-07-02   
231-580 9 Big Rapids MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-581 A Alba MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348      
231-581 0 Alba MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348      
231-582 A Boyne City MI BOCYMIBCDS0  9323 MICHIGAN BELL TEL CO 348      
231-583 A Ludington MI GDRPMIBLX8Z  2550 123.NET, INC. 348      
231-583 0 Ludington MI GDRPMIBLX8Z  2550 123.NET, INC. 348      
231-583 1 Ludington MI GDRPMIBLX8Z  2550 123.NET, INC. 348      
231-583 2 Ludington MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-584 A Alba MI LKNRMIXJDS1  0721 PIGEON TEL. CO. 348      
231-585 A Lakes of the North MI LKNRMIXJDS1  0721 PIGEON TEL. CO. 348      
231-587 A Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 0 Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 1 Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 2 Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 3 Mancelona MI BRSPMI09DS0  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 348   2015-12-24   
231-587 4 Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 5 Mancelona MI MNCLMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-587 6 Mancelona MI TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-15   
231-587 7 Mancelona MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   

<< 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 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.