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: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
235-221 A Jefferson City MO   321J HD CARRIER LLC 521   2026-05-22   
235-221 7 Jefferson City MO   321J HD CARRIER LLC 521   2026-05-22   
235-221 8 Jefferson City MO   321J HD CARRIER LLC 521   2026-05-22   
235-221 9 Jefferson City MO   321J HD CARRIER LLC 521   2026-05-22   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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