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: 203

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-203 A Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 0 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 1 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 2 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 3 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 4 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 5 Lansing MI LNNGMIMN02Z  318J COMCAST IP PHONE, LLC 346   2011-06-23   
517-203 6 Lansing MI LNNGMIMNXSZ  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346   2005-08-05   
517-203 7 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-203 8 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2005-03-02   
517-203 9 Lansing MI LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2005-03-02   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.