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: HRCKILXEDS0

Remotes:

Switch Switch name Switch type
OCNEILXCRS0  OCONEE  DC1 
SFTNILXERS0  SEFTON  DC1 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
618-428 A Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 0 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 1 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 2 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 3 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 5 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 7 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 8 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      
618-428 9 Herrick IL 1055 FRONTIER COMMUNICATIONS-MIDLAND, INC. 520      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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