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: FNTNMO54DS0

Remotes:

Switch Switch name Switch type
ANTOMO50RS2  ANTONIA  EXM 
CDHLMO51RS0  CEDAR HILL  EXM 
HGRGMO56RS2  HIGH RIDGE  EXM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
636-305 A Fenton MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-326 A Fenton MO 9533 SOUTHWESTERN BELL 520      
636-343 A Fenton MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-349 A Fenton MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-496 A Fenton MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-717 A Fenton MCA3 MO 9533 SOUTHWESTERN BELL 520      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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