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.

Switch: STLSMOGZX3X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
235-465 A Linn MO 824J OPENTACT INC. 521   2026-07-25   
235-465 8 Linn MO 824J OPENTACT INC. 521   2026-07-25   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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