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.

OCN: 6265 UNITED STATES CELLULAR - IL

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
815-988 0 Rockford IL   360      
815-988 1 Rockford IL   360      
815-988 2 Rockford IL   360      
815-988 3 Rockford IL   360      
815-988 4 Rockford IL   360      
815-988 5 Rockford IL   360      
815-988 6 Rockford IL   360      
815-988 7 Rockford IL   360      
815-988 8 Rockford IL   360      
815-988 9 Rockford IL   360      
815-994 0 Dixon IL DKLBILRS3MD  364   2004-10-21   
815-994 2 Dixon IL DKLBILRS3MD  364   2004-10-21   
815-994 3 Dixon IL DKLBILRS3MD  364   2004-10-21   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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