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.

NPA: 220 [Rate centres in NPA 220] [Dial plan for NPA 220]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
220-678 A Somerset OH CLMBOH1169Z  7421 AT&T - LOCAL 324      
220-678 0 Somerset OH CLMBOHLTEMD  515J IP HORIZON LLC 324   2024-04-29   
220-678 1 Somerset OH CLMBOHLTEMD  515J IP HORIZON LLC 324   2024-04-29   
220-678 8 Somerset OH CLMBOH1143Z  624H ONVOY SPECTRUM, LLC 324   2024-08-02   
220-678 9 Somerset OH CLMBOH1169Z  7421 AT&T - LOCAL 324   2022-10-07   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.