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.

NPA: 405 [Rate centres in NPA 405] [Dial plan for NPA 405]

NXX: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
405-280 A Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 0 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 1 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 2 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 4 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 5 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 6 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 7 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 8 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      
405-280 9 Oklahoma City OK OKCYOKCEDS0  9533 SOUTHWESTERN BELL 536      

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.