Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 580 [Rate centres in NPA 580] [Dial plan for NPA 580]

NXX: 725

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-725 A Billings OK BLNGOKMARS1  9533 SOUTHWESTERN BELL 536      
580-725 0 Billings OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2024-10-24   
580-725 1 Billings OK BLNGOKMARS1  9533 SOUTHWESTERN BELL 536      
580-725 2 Billings OK OKCYOKCEXBZ  073H TELNYX LLC 536   2019-09-28   
580-725 3 Billings OK BLNGOKMARS1  9533 SOUTHWESTERN BELL 536      
580-725 5 Billings OK OKCYOKCEXXY  516C AT&T CORP. 536   2011-08-25   
580-725 7 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-04-15   
580-725 8 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-04-15   
580-725 9 Billings OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2024-10-24   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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