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: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-477 A Holt MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346      
517-477 0 Holt MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2005-02-13   
517-477 1 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-03-06   
517-477 2 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-03-06   
517-477 3 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-04-08   
517-477 4 Holt MI LNNGMIMN12Z  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 346   2005-04-11   
517-477 5 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-04-08   
517-477 6 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-05-18   
517-477 7 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-05-18   
517-477 8 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-05-18   
517-477 9 Holt MI LNNGMIXIDS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 346   2005-07-19   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.