Local Calling Guide

Area code/prefix search

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

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-575 A   624H ONVOY SPECTRUM, LLC 536   2025-03-06   
580-575 0   624H ONVOY SPECTRUM, LLC 536   2025-03-06   
580-575 5   145J TERRA NOVA TELECOM INC. 536   2025-07-10   
580-633 A ELDROKMARS1  9533 SOUTHWESTERN BELL 536      
580-633 0   409F ONVOY, LLC - OK 536   2021-04-26   
580-633 1   9533 SOUTHWESTERN BELL 536      
580-633 2   9533 SOUTHWESTERN BELL 536      
580-633 3   409F ONVOY, LLC - OK 536   2016-06-26   
580-633 4   409F ONVOY, LLC - OK 536   2021-05-28   
580-633 5   516C AT&T CORP. 536   2011-08-25   
580-633 6   409F ONVOY, LLC - OK 536   2020-07-11   
580-633 7   409F ONVOY, LLC - OK 536   2020-07-11   
580-633 8   073H TELNYX LLC 536   2019-09-28   
580-633 9   384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2016-02-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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