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: 940

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-940 A Lansing MI LNNGMIMNX8X  156J RCLEC, INC. 346      
517-940 0 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2015-11-05   
517-940 1 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2015-11-05   
517-940 2 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2015-11-05   
517-940 3 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2015-11-05   
517-940 4 Lansing MI LNNGMIMNX8X  156J RCLEC, INC. 346   2014-09-25   
517-940 5 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2015-11-05   
517-940 6 Lansing MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2015-07-23   
517-940 7 Lansing MI LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2015-04-25   
517-940 8 Lansing MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2014-10-20   
517-940 9 Lansing MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2014-10-20   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.