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: CHCGILBWCM2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
219-792 A Gary IN 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-232 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-323 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-333 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-390 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-393 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-400 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-457 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-514 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-689 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-713 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-740 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-760 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-839 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-903 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-265 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-298 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-316 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-680 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-704 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-714 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
630-727 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-319 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-399 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-521 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-569 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-605 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-643 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-661 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-718 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-727 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-988 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
708-992 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-323 A Chicago Zone 02-Edgewater IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-333 A Chicago Zone 02-Edgewater IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-400 A Chicago Zone 02-Edgewater IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-713 A Chicago Zone 02-Edgewater IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-781 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
773-845 A Chicago Zone 01-Wabash IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
815-279 A Kankakee IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
815-767 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
847-319 A La Grange IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
847-389 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
847-547 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
847-799 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      
847-992 A Northbrook IL 9748 AMERICAN MESSAGING SERVICES, LLC 358      

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

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