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: 474

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-474 A Avoca MI SFLDMIBVDS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
810-474 2 Avoca MI   543C ONVOY, LLCV - MI 340   2021-03-05   
810-474 3 Avoca MI   543C ONVOY, LLCV - MI 340   2021-03-05   
810-474 4 Avoca MI   543C ONVOY, LLCV - MI 340   2013-03-15   
810-474 5 Avoca MI   624H ONVOY SPECTRUM, LLC 340   2021-06-13   
810-474 6 Avoca MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2014-04-12   
810-474 7 Avoca MI   145J TERRA NOVA TELECOM INC. 340   2025-07-10   
810-474 8 Avoca MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2024-05-19   
810-474 9 Avoca MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.