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: 990

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-990 A Duncan OK OKCYOKCE04Z  516J TON80 COMMUNICATIONS, LLC 536      
580-990 0 Duncan OK   516J TON80 COMMUNICATIONS, LLC 536   2022-05-18   
580-990 1 Duncan OK   409F ONVOY, LLC - OK 536   2023-08-12   
580-990 2 Duncan OK   409F ONVOY, LLC - OK 536   2023-08-12   
580-990 3 Duncan OK   409F ONVOY, LLC - OK 536   2023-08-12   
580-990 4 Duncan OK   409F ONVOY, LLC - OK 536   2023-08-12   
580-990 5 Duncan OK   409F ONVOY, LLC - OK 536   2023-08-12   
580-990 6 Duncan OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-08-15   
580-990 7 Duncan OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2024-09-16   
580-990 8 Duncan OK   409F ONVOY, LLC - OK 536   2024-04-15   
580-990 9 Duncan OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-08-15   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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