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: BLTNILTSCMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
309-920 A Bloomington IL 321J HD CARRIER LLC 366      
309-920 8 Bloomington IL 321J HD CARRIER LLC 366   2023-05-11   
309-920 9 Bloomington IL 321J HD CARRIER LLC 366   2023-05-11   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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