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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Switch: RCFRILRTXMY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
779-366 A Rockford IL 321J HD CARRIER LLC 360      
779-366 8 Rockford IL 321J HD CARRIER LLC 360   2023-05-11   
779-366 9 Rockford IL 321J HD CARRIER LLC 360   2023-05-11   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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