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: 305

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
580-305 A Frederick OK ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-305 0 Frederick OK ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-305 1 Frederick OK ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-305 2 Frederick OK ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-305 3 Frederick OK ENIDOKKI0MD  6272 UNITED STATES CELLULAR - OK 536      
580-305 4 Frederick OK   145J TERRA NOVA TELECOM INC. 536   2025-07-10   
580-305 5 Frederick OK OKCYOKSX4MD  6529 T-MOBILE USA, INC. 536   2025-05-05   
580-305 7 Frederick OK OKCYOKCEXMZ  145J TERRA NOVA TELECOM INC. 536   2026-03-15   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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