Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 810 [Rate centres in NPA 810] [Dial plan for NPA 810]

NXX: 671

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-671 A Algonac MI SFLDMIBVDS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
810-671 0 Algonac MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-10-01   
810-671 1 Algonac MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2021-09-02   
810-671 2 Algonac MI   318J COMCAST IP PHONE, LLC 340   2015-10-16   
810-671 3 Algonac MI   318J COMCAST IP PHONE, LLC 340   2011-12-06   
810-671 4 Algonac MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2021-09-02   
810-671 5 Algonac MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2012-02-23   
810-671 6 Algonac MI   543C ONVOY, LLCV - MI 340   2014-11-08   
810-671 7 Algonac MI   829J PAETEC ITEL, LLC 340   2007-12-11   
810-671 8 Algonac MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2021-09-02   
810-671 9 Algonac MI   770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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