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: 517 [Rate centres in NPA 517] [Dial plan for NPA 517]

NXX: 445

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-445 A Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      
517-445 0 Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      
517-445 1 Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      
517-445 2 Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      
517-445 3 Clayton MI PTBGMIAKDS0  558A DEERFIELD FARMERS' TELEPHONE COMPANY - MI 340   2012-04-05   
517-445 4 Clayton MI   318J COMCAST IP PHONE LLC 340   2010-06-23   
517-445 5 Clayton MI SFLDMIMKDS2  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-01-03   
517-445 6 Clayton MI SFLDMITODS2  543C ONVOY, LLC - MI 340   2020-09-07   
517-445 7 Clayton MI SFLDMITODS2  543C ONVOY, LLC - MI 340   2020-06-08   
517-445 8 Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      
517-445 9 Clayton MI CYTNMIXIDS0  0672 COMMUNICATIONS CORP. OF MICHIGAN 340      

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.