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: ALNSMIXJDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
231-548 A Alanson MI 0702 CENTURYTEL OF MICHIGAN, INC. DBA CENTURYLINK 348      

Last updated: Sat, 25 Feb 2023 02:10:49 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.