Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-583 A Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 0 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 1 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 2 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 3 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 4 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 5 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 6 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 7 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      
956-583 8 Mission TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2025-11-14   
956-583 9 Mission TX MSSNTXMIDS0  9533 SOUTHWESTERN BELL 568      

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

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