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]

NXX: 527

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-527 A Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 0 Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 1 Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 2 Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 3 Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 4 Big Rapids MI GDRPMIBLXLZ  528A FIRST COMMUNICATIONS, LLC - MI 348   2008-10-10   
231-527 5 Big Rapids MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2009-09-26   
231-527 6 Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-527 7 Big Rapids MI GDRPMIBL06Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 348   2009-10-23   
231-527 8 Big Rapids MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2011-05-22   
231-527 9 Big Rapids MI GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2011-08-15   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.