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: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-521 A Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 0 Webberville MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2009-12-12   
517-521 1 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 2 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 3 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 4 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 5 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 6 Webberville MI WBVLMIXJDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-521 7 Webberville MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2013-04-05   
517-521 8 Webberville MI LNNGMIMN00Z  624H ONVOY SPECTRUM, LLC 346   2021-06-17   
517-521 9 Webberville MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2023-04-22   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.