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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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
734-309 4 Wyandotte MI SFLDMIMKNMD  340   2011-05-30   
734-335 5 Plymouth MI SFLDMIMKNMD  340   2010-08-26   
734-405 3 Wayne MI SFLDMIMKNMD  340   2009-01-07   
734-452 8 Livonia MI SFLDMIMKNMD  340   2008-07-27   
734-619 2 Ann Arbor MI SFLDMIMKNMD  340   2008-11-22   
734-695 7 Ypsilanti MI SFLDMIMKNMD  340   2008-12-26   
734-726 1 Dexter MI SFLDMIMKNMD  340   2009-12-28   
734-731 8 Monroe MI SFLDMIMKNMD  340   2010-01-11   
734-818 2 Trenton MI SFLDMIMKNMD  340   2012-03-22   
740-232 1 St Clairsville OH CLMDOH44ZMD  324   2008-06-02   
740-307 A Ironton OH CLMDOH44ZMD  324      
740-307 9 Ironton OH   324      
740-313 A Washington Court House OH CLMDOH44ZMD  324      
740-313 9 Washington Court House OH   324      
740-434 A Marietta OH CLMDOH44ZMD  324      
740-434 9 Marietta OH   324      
740-539 A Lancaster OH CLMDOH44ZMD  324      
740-539 9 Lancaster OH   324      
740-610 A Coshocton OH CLMDOH44ZMD  324      
740-610 9 Coshocton OH   324      
740-794 A Gallipolis OH CLMDOH44ZMD  324      
740-794 9 Gallipolis OH   324      
740-891 A Zanesville OH CLMDOH44ZMD  324      
740-891 9 Zanesville OH   324      
740-910 A London OH CLMDOH44ZMD  324      
740-910 9 London OH   324      
740-996 A Steubenville OH CLMDOH44ZMD  324      
740-996 9 Steubenville OH   324      
740-997 A Beallsville OH CLMDOH44ZMD  324      
740-997 9 Beallsville OH   324      
773-241 3 Chicago Zone 07-Hyde Park IL CHCGILWUX6X  358   2004-11-12   
773-249 3 Chicago Zone 11-O'Hare IL CHCGILWUX6X  358   2004-11-12   
773-269 6 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358   2005-07-04   
773-295 3 Chicago Zone 05-Merrimac IL CHCGILWUX6X  358   2004-11-12   
773-308 A Chicago Zone 03-Kildare IL CHCGILWUX6X  358      
773-308 0 Chicago Zone 03-Kildare IL CHCGILWUX6X  358      
773-308 1 Chicago Zone 03-Kildare IL CHCGILWUX6X  358      
773-308 7 Chicago Zone 03-Kildare IL CHCGILWUX6X  358      
773-328 A Chicago Zone 04-Humboldt IL CHCGILWUX6X  358      
773-328 2 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358      
773-328 3 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358      
773-328 4 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358      
773-328 5 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358   2004-09-12   
773-328 6 Chicago Zone 04-Humboldt IL CHCGILWUX6X  358      
773-329 4 Chicago Zone 03-Kildare IL CHCGILWUX6X  358   2002-05-22   
773-336 A Chicago Zone 09-South Chicago IL CHCGILWUX6X  358      
773-336 0 Chicago Zone 09-South Chicago IL   358      
773-336 1 Chicago Zone 09-South Chicago IL   358      
773-336 3 Chicago Zone 09-South Chicago IL CHCGILWUX6X  358   2004-11-12   
773-336 6 Chicago Zone 09-South Chicago IL CHCGILWUX6X  358   2004-09-09   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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