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: 409 [Rate centres in NPA 409] [Dial plan for NPA 409]

NXX: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
409-357 A China TX   515J IP HORIZON LLC 562   2025-04-03   
409-357 1 China TX   515J IP HORIZON LLC 562   2025-04-03   
409-357 7 China TX   883K AHOI LLC 562   2026-05-23   

Last updated: Sat, 02 May 2026 12:20:53 UTC

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