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: 816C INTRADO COMMUNICATIONS, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
217-903 7 Champaign-Urbana IL   370   2026-10-23   
224-481 6 Wheeling IL   358   2026-11-01   
224-524 7 Roselle IL   358   2026-10-10   
224-664 4 Des Plaines IL   358   2026-11-01   
224-679 9 Arlington Heights IL   358   2026-10-23   
331-339 6 Aurora IL   358   2026-10-23   
331-346 2 Naperville IL   358   2026-10-16   
447-299 9 Springfield IL   374   2026-10-10   
464-292 1 La Grange IL   358   2026-11-09   
779-363 7 Rockford IL   360   2026-10-10   
779-449 7 Joliet IL   358   2026-11-23   
861-444 A Peoria IL   368   2026-10-31   
861-444 4 Peoria IL   368   2026-10-31   
872-291 7 Chicago Zone 08-Portsmouth IL   358   2026-11-01   
872-394 7 Chicago Zone 06-Kedzie IL   358   2026-11-01   
872-500 7 Chicago Zone 04-Humboldt IL   358   2026-10-16   
872-799 7 Chicago Zone 10-Beverly IL   358   2026-10-30   

Last updated: Sun, 01 Nov 2026 02:11:49 UTC

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