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: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
517-540 A Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 0 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 1 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 2 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 3 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 4 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 5 Howell MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2023-08-13   
517-540 6 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 7 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 8 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
517-540 9 Howell MI HOWLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.