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.

OCN: 824C INTRADO COMMUNICATIONS, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
235-218 7 Jefferson City MO   521   2026-09-27   
573-464 7 California MO   521   2026-09-27   
573-622 0 Clarksburg MO   521   2026-10-05   
573-750 7 Eugene MO   521   2026-10-09   
573-903 7 Brazito MO   521   2026-10-16   
573-909 7 New Bloomfield MO   521   2026-10-16   
573-978 7 Centertown MO   521   2026-10-09   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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