Local Calling Guide

Area code/prefix search

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NPA: 740 [Rate centres in NPA 740] [Dial plan for NPA 740]

NXX: 581

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
740-581 A Caldwell OH CMBROHXBAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324      
740-581 0 Caldwell OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324      
740-581 1 Caldwell OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324      
740-581 2 Caldwell OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324      
740-581 3 Caldwell OH   464C ONVOY, LLC - OH 324   2022-10-16   
740-581 4 Caldwell OH   464C ONVOY, LLC - OH 324   2022-10-16   
740-581 5 Caldwell OH   145J TERRA NOVA TELECOM INC. 324   2025-07-17   
740-581 8 Caldwell OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2014-10-04   
740-581 9 Caldwell OH   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 324   2014-09-29   

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

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