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: CLMBOH1164A

Remotes:

Switch Switch name Switch type
CLMBOH27RS1  COLUMBUS 27 RS1  RSC 
CLMBOH29RS1  COLUMBUS 29 RS1  RSC 
UPAROH48RS1  UP ARLINGTON 48 RS1  RSC 
WOTNOH88RS1  WORTHINGTON 88 RS1  RSC 

<< 1 2 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date

<< 1 2 >>

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.