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: 541

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-541 A Charlotte MI CHRLMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-541 0 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 1 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 2 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 3 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 4 Charlotte MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2004-07-16   
517-541 5 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 6 Charlotte MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 346   2005-03-27   
517-541 7 Charlotte MI   543C ONVOY, LLCV - MI 346   2007-03-05   
517-541 8 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      
517-541 9 Charlotte MI   9323 MICHIGAN BELL TEL CO 346      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.