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.

South English, IA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
319-301 A NLBTIAXO2MD  593K MCC TELEPHONY LLC 635      
319-301 1   593K MCC TELEPHONY LLC 635   2021-06-11   
319-667 A SENGIAXODS1  1247 MODERN COOP. TEL. CO. 635      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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