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: FSTSMOYEDS0

Remotes:

Switch Switch name Switch type
BLDLMOGURS1  BLOOMSDALE  RSC 
DESTMOGIRS0  DE SOTO  RSC 
HLBOMO66RS1  HILLSBORO  RSC 
PVLYMOAARS0  PEVELY  RSC 
RCWDMOORRS1  RICHWOODS  RSC 
SGNVMOTURS2  STE GENEVIEVE  RSC 
WAREMOWHRS0  WARE  RSC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
636-931 A Festus-Crystal City MCA5 MO 9533 SOUTHWESTERN BELL 520      
636-933 A Festus-Crystal City MO 9533 SOUTHWESTERN BELL 520      
636-937 A Festus-Crystal City MO 9533 SOUTHWESTERN BELL 520      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.