Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: CHCGILWUX6X

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
773-336 A Chicago Zone 09-South Chicago IL 460K FIRST COMMUNICATIONS, LLC 358      
773-336 3 Chicago Zone 09-South Chicago IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-336 6 Chicago Zone 09-South Chicago IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-09   
773-340 5 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358   2008-06-15   
773-341 A Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358      
773-341 3 Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-12   
773-357 A Chicago Zone 11-O'Hare IL 460K FIRST COMMUNICATIONS, LLC 358      
773-357 3 Chicago Zone 11-O'Hare IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-12   
773-357 9 Chicago Zone 11-O'Hare IL 460K FIRST COMMUNICATIONS, LLC 358      
773-358 3 Chicago Zone 07-Oakland IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-12   
773-358 6 Chicago Zone 07-Oakland IL 460K FIRST COMMUNICATIONS, LLC 358   2006-01-18   
773-359 0 Chicago Zone 09-South Chicago IL 460K FIRST COMMUNICATIONS, LLC 358   2000-08-07   
773-360 6 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2006-05-12   
773-362 3 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-366 7 Chicago Zone 10-Beverly IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-22   
773-382 4 Chicago Zone 09-South Chicago IL 460K FIRST COMMUNICATIONS, LLC 358   2003-03-26   
773-413 1 Chicago Zone 05-Austin IL 460K FIRST COMMUNICATIONS, LLC 358   2004-08-06   
773-413 3 Chicago Zone 05-Austin IL 460K FIRST COMMUNICATIONS, LLC 358   2005-08-19   
773-413 6 Chicago Zone 05-Austin IL 460K FIRST COMMUNICATIONS, LLC 358   2003-02-21   
773-424 9 Summit IL 460K FIRST COMMUNICATIONS, LLC 358   2008-05-31   
773-432 A Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358      
773-432 0 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358   2005-10-24   
773-432 1 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358   2004-08-06   
773-432 2 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358      
773-432 3 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358      
773-432 6 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358      
773-432 9 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358      
773-433 1 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-31   
773-433 3 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-06   
773-433 5 Chicago Zone 02-Edgewater IL 460K FIRST COMMUNICATIONS, LLC 358   2005-08-19   
773-449 2 Chicago Zone 09-Mitchell IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-16   
773-484 1 Chicago Zone 07-Stewart IL 460K FIRST COMMUNICATIONS, LLC 358   2010-05-20   
773-494 8 Chicago Zone 03-Kildare IL 460K FIRST COMMUNICATIONS, LLC 358   2005-10-01   
773-499 7 Chicago Zone 03-Kildare IL 460K FIRST COMMUNICATIONS, LLC 358   2005-08-29   
773-526 4 Chicago Zone 08-Portsmouth IL 460K FIRST COMMUNICATIONS, LLC 358   2004-09-12   
773-537 A Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358      
773-537 0 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-537 1 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-537 2 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-537 3 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-537 6 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-537 7 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-11-12   
773-537 9 Chicago Zone 04-Humboldt IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-15   
773-565 A Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358      
773-565 0 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   
773-565 1 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   
773-565 2 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   
773-565 3 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   
773-565 6 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   
773-565 9 Chicago Zone 06-Kedzie IL 460K FIRST COMMUNICATIONS, LLC 358   2004-07-12   

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

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