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: 996

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-996 A Williamston MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-996 0 Williamston MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2020-11-08   
517-996 1 Williamston MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2021-03-05   
517-996 2 Williamston MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2009-09-26   
517-996 3 Williamston MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-996 4 Williamston MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-996 5 Williamston MI LNNGMIMNXQZ  508J CENTURYLINK COMMUNICATIONS, LLC 346   2016-01-27   
517-996 6 Williamston MI LNNGMIMN15Z  961J WOW! INTERNET, CABLE AND PHONE 346   2012-05-20   
517-996 7 Williamston MI MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-996 8 Williamston MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2021-03-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.