Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Helena, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-779 A OKCYOKMPAMD  5813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 536      
580-779 2   5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536   2022-09-02   
580-779 7   145J TERRA NOVA TELECOM INC. 536   2025-07-10   
580-779 9   5813 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 536   2023-07-01   
580-852 A HLNAOKXARS0  2018 PIONEER TEL. COOP., INC. 536      

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

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