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: 664

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-664 A Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 0 Lansing MI LNNGMIMNXMZ  516C AT&T CORP. 346   2016-09-19   
517-664 1 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 2 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 3 Lansing MI   145J TERRA NOVA TELECOM INC. 346   2021-10-29   
517-664 4 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 5 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 6 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 7 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 8 Lansing MI ELNSMIMNDS0  9323 MICHIGAN BELL TEL CO 346      
517-664 9 Lansing MI LNNGMIMNX5Z  543C ONVOY, LLCV - MI 346   2011-06-04   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.