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: ARMROKMADS1

Remotes:

Switch Switch name Switch type
DAVSOKMARS1  DAVIS  5ER 
HLTNOKMARS1  HEALDTON  5ER 
MDLLOKMARS1  MADILL  5ER 
MRTTOKMARS1  MARIETTA  5ER 
RNNGOKMARS1  RINGLING  5ER 
TSMGOKMARS1  TISHOMINGO  5ER 
WLSNOKMARS1  WILSON  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
580-220 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-221 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-223 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-224 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-226 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-319 A Ardmore OK 9533 SOUTHWESTERN BELL 536      
580-490 A Ardmore OK 9533 SOUTHWESTERN BELL 536      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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