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: VYPKMO64DS0

Remotes:

Switch Switch name Switch type
PCFCMO61RS0  PACIFIC  EXM 
STCLMOMARS0  ST CLAIR  EXM 
UNINMOLURS0  UNION  EXM 
WASHMOBERS0  WASHINGTON  EXM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
636-225 A Valley Park MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-226 A Valley Park MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-517 A Valley Park MO 9533 SOUTHWESTERN BELL 520      
636-529 A Valley Park MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-825 A Valley Park MO 9533 SOUTHWESTERN BELL 520      
636-827 A Valley Park MCA3 MO 9533 SOUTHWESTERN BELL 520      
636-861 A Valley Park MCA3 MO 9533 SOUTHWESTERN BELL 520      

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

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