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]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-990 A Port Huron MI SFLDMIBVDS0  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
810-991 A Hartland MI SFLDMIDICA0  2550 123.NET, LLC 340      

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Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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