Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: DUKEOKXADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-679 A Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 0 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 1 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 2 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 3 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 5 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 6 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 7 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 8 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      
580-679 9 Duke OK 2025 SOUTHWEST OKLAHOMA TEL. CO. 536      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.