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
231-303 8 Newaygo MI TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-18   
231-303 9 Newaygo MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   
231-304 A Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-304 1 Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-01-07   
231-304 3 Brutus MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-06-18   
231-304 4 Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-12-26   
231-304 5 Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-12-26   
231-304 8 Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-03-04   
231-304 9 Brutus MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-12   
231-305 A Big Rapids MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-306 A Cadillac MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-307 A Morley MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-307 0 Morley MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-307 1 Morley MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-01-04   
231-307 2 Morley MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-17   
231-307 3 Morley MI GFTPMIEF1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 348   2007-02-25   
231-307 4 Morley MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2014-09-20   
231-307 5 Morley MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2008-05-08   
231-307 6 Morley MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2018-06-02   
231-307 7 Morley MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   
231-307 8 Morley MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2008-05-08   
231-307 9 Morley MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-308 A Charlevoix MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-309 A Manistee MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-310 A Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-310 0 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-09-12   
231-310 1 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-09-12   
231-310 2 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-05-09   
231-310 3 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-05-09   
231-310 4 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-05-09   
231-310 5 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2018-11-24   
231-310 6 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2020-05-09   
231-310 7 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-310 8 Falmouth MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-310 9 Falmouth MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-06-19   
231-312 A Frankfort MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-313 A Traverse City MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-314 A Kalkaska MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-315 A Muskegon MI GDRPMIBL44Z  6630 USA MOBILITY WIRELESS, INC. 348      
231-316 A Ludington MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-317 A Boyne City MI GDRPMIBL44Z  6630 USA MOBILITY WIRELESS, INC. 348      
231-318 A Traverse City MI GDRPMIBL44Z  6630 USA MOBILITY WIRELESS, INC. 348      
231-319 A Mackinaw City MI GDRPMIBQ1MD  4632 TELNET WORLDWIDE, INC. 348      
231-320 A Torch River Bridge MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348      
231-320 0 Torch River Bridge MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2021-11-04   
231-320 1 Torch River Bridge MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-06   
231-320 2 Torch River Bridge MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-03-04   
231-320 3 Torch River Bridge MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-11-05   
231-320 4 Torch River Bridge MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-01-04   
231-320 8 Torch River Bridge MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-09-28   

<< 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: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.