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: 810 [Rate centres in NPA 810] [Dial plan for NPA 810]

NXX: 315

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-315 A Dryden MI SFLDMIDICA0  2550 123.NET, LLC 340      
810-315 0 Dryden MI ANARMIMNX8X  3535 ACD TELECOM, INC. - MI 340   2005-07-23   
810-315 6 Dryden MI SFLDMIMKDS2  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-05-01   
810-315 9 Dryden MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 340   2026-03-01   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.