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: CHLCMOMIDS0

Remotes:

Switch Switch name Switch type
BRFDMOCLRS0  Brookfield  RSS 
CRTNMOLIRS0  Carrollton  RSS 
MRCLMOCHRS0  Marceline  RSS 
TRENMOELRS0  Trenton  RSS 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
660-646 A Chillicothe MO 9533 SOUTHWESTERN BELL 524      
660-707 A Chillicothe MO 9533 SOUTHWESTERN BELL 524      
660-752 A Chillicothe MO 9533 SOUTHWESTERN BELL 524      

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

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