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: 422

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-422 A Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536      
580-422 0 Billings OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2021-11-21   
580-422 1 Billings OK OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2016-02-18   
580-422 2 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-06-14   
580-422 3 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-10-29   
580-422 4 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-10-29   
580-422 5 Billings OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-08-06   
580-422 6 Billings OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2021-07-04   
580-422 7 Billings OK OKCZOKZCFMD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536   2019-06-28   
580-422 9 Billings OK OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2021-11-21   

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

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