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: 306

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-306 A Hudson MI PLMOMIFAFMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340      
517-306 0 Hudson MI PLMOMIFAFMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340      
517-306 1 Hudson MI ANARMIMNDS2  3535 ACD TELECOM, INC. - MI 340   2005-07-21   
517-306 2 Hudson MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2004-11-14   
517-306 3 Hudson MI DTRTMIAPG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2009-09-26   
517-306 4 Hudson MI SFLDMIMKDS2  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-01-03   
517-306 5 Hudson MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2007-03-05   
517-306 6 Hudson MI WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2008-01-23   
517-306 7 Hudson MI DTRTMIDJCMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2009-04-16   
517-306 8 Hudson MI DTRTMIDJCMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2008-01-11   
517-306 9 Hudson MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2008-09-17   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.