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: 625

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-625 A Cheboygan MI CHBYMISORSA  9323 MICHIGAN BELL TEL CO 348      
231-625 0 Cheboygan MI CHBYMISORSA  9323 MICHIGAN BELL TEL CO 348      
231-625 1 Cheboygan MI GDRPMIBL41Z  506J TWILIO INTERNATIONAL, INC. 348   2021-07-26   
231-625 2 Cheboygan MI CHBYMISORSA  9323 MICHIGAN BELL TEL CO 348      
231-625 3 Cheboygan MI GDRPMIBL06Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 348   2016-03-21   
231-625 4 Cheboygan MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-03-14   
231-625 5 Cheboygan MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-03-14   
231-625 6 Cheboygan MI GDRPMIBL36Z  624H ONVOY SPECTRUM, LLC 348   2021-06-18   
231-625 7 Cheboygan MI TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-16   
231-625 8 Cheboygan MI CHBYMISORSA  9323 MICHIGAN BELL TEL CO 348      
231-625 9 Cheboygan MI CHBYMISORSA  9323 MICHIGAN BELL TEL CO 348      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.