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: 918 [Rate centres in NPA 918] [Dial plan for NPA 918]

NXX: 421

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
918-421 A McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 0 McAlester OK TULUOKXOGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538      
918-421 1 McAlester OK TULUOKXOGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538      
918-421 2 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 3 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 4 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 5 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 6 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 7 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 8 McAlester OK MCLSOKMADS0  9533 SOUTHWESTERN BELL 538      
918-421 9 McAlester OK TULUOKXOGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 538      

Last updated: Tue, 24 Jan 2023 03:01:57 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.