Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
224-386 2 Palatine IL CHCGILCPDS9  358   2015-04-24   
224-404 5 Elk Grove IL CHCGILCPDS9  358   2014-02-25   
224-442 7 Schiller Park IL CHCGILCPDS9  358   2015-05-10   
224-470 4 Skokie IL CHCGILCPDS9  358   2015-04-26   
312-625 4 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2014-02-24   
312-638 5 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2015-04-24   
312-668 1 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2019-09-16   
312-754 A Chicago Zone 01-Calumet IL CHCGILCPDS9  358      
312-754 2 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2013-04-25   
312-763 7 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2014-06-27   
312-796 2 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2016-09-17   
312-964 4 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2015-09-09   
312-966 8 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2015-02-13   
312-973 5 Chicago Zone 01-Calumet IL CHCGILCPDS9  358   2014-04-15   
331-315 2 Lombard IL CHCGILCPDS9  358   2016-11-13   
331-318 6 Lemont IL CHCGILCPDS9  358   2014-02-27   
331-777 7 Downers Grove IL CHCGILCPDS9  358   2014-04-10   
630-481 5 Oak Brook IL CHCGILCPDS9  358   2014-02-25   
708-933 2 Calumet City IL CHCGILCPDS9  358   2015-12-17   
847-610 2 Roselle IL CHCGILCPDS9  358   2015-10-17   
847-787 2 Bensenville IL CHCGILCPDS9  358   2014-07-30   
872-242 3 Chicago Zone 04-Humboldt IL CHCGILCPDS9  358   2015-05-28   
872-267 8 Chicago Zone 08-Portsmouth IL CHCGILCPDS9  358   2015-03-26   
872-469 2 Chicago Zone 03-Kildare IL CHCGILCPDS9  358   2015-02-20   
872-901 4 Chicago Zone 07-Stewart IL CHCGILCPDS9  358   2015-02-20   
872-903 A Chicago Zone 09-South Chicago IL CHCGILCPDS9  358      
872-903 2 Chicago Zone 09-South Chicago IL CHCGILCPDS9  358   2015-05-29   
872-985 A Chicago Zone 02-Edgewater IL CHCGILCPDS9  358      
872-985 2 Chicago Zone 02-Edgewater IL CHCGILCPDS9  358   2015-03-30   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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