Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 734 [Rate centres in NPA 734] [Dial plan for NPA 734]

NXX: 623

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
734-623 A Ann Arbor MI ANARMIMNDS0  9323 MICHIGAN BELL TEL CO 340      
734-623 0 Ann Arbor MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2022-07-21   
734-623 1 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 2 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 3 Ann Arbor MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2011-10-03   
734-623 4 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 5 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 6 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 7 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 8 Ann Arbor MI   9323 MICHIGAN BELL TEL CO 340      
734-623 9 Ann Arbor MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2018-03-29   

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

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