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.

Switch: CRNLMIMNRSA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
906-384 A Cornell MI 9323 MICHIGAN BELL TEL CO 342      
906-384 6 Cornell MI 9323 MICHIGAN BELL TEL CO 342      

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.