Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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 CYTNMIXIPS0  0672 COMMUNICATIONS CORP. OF MI 340      
517-445 0 Clayton MI   0672 COMMUNICATIONS CORP. OF MI 340      
517-445 1 Clayton MI   0672 COMMUNICATIONS CORP. OF MI 340      
517-445 2 Clayton MI   0672 COMMUNICATIONS CORP. OF MI 340      
517-445 3 Clayton MI   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   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-01-03   
517-445 6 Clayton MI   543C ONVOY, LLCV - MI 340   2020-09-07   
517-445 7 Clayton MI   543C ONVOY, LLCV - MI 340   2020-06-08   
517-445 8 Clayton MI   0672 COMMUNICATIONS CORP. OF MI 340      
517-445 9 Clayton MI   0672 COMMUNICATIONS CORP. OF MI 340      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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