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

NXX: 204

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
235-204 A Columbia MO   321J HD CARRIER LLC 521   2026-02-08   
235-204 2 Columbia MO   321J HD CARRIER LLC 521   2026-02-08   
235-204 3 Columbia MO   321J HD CARRIER LLC 521   2026-02-08   
235-204 5 Columbia MO   321J HD CARRIER LLC 521   2026-02-08   
235-204 9 Columbia MO   321J HD CARRIER LLC 521   2026-02-08   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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