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: 603

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-603 A Grand Blanc MI GRBLMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
810-603 0 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 1 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 2 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 3 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 4 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 5 Grand Blanc MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-02-02   
810-603 6 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 7 Grand Blanc MI   318J COMCAST IP PHONE, LLC 340   2013-09-08   
810-603 8 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      
810-603 9 Grand Blanc MI   9323 MICHIGAN BELL TEL CO 340      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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