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: 235 [Rate centres in NPA 235] [Dial plan for NPA 235]

NXX: 217

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
235-217 A Columbia MO   700J WAVENATION, LLC 521   2025-09-06   
235-217 0 Columbia MO   700J WAVENATION, LLC 521   2025-09-06   
235-217 8 Columbia MO   6529 T-MOBILE USA, INC. 521   2025-11-24   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.