Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
312-741 7 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-09-24   
312-761 6 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-11-29   
312-761 7 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-12-14   
312-768 A Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-768 5 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-776 0 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-05-27   
312-776 1 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-05-27   
312-779 8 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-07-13   
312-872 6 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-11-19   
312-892 A Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 0 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 1 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 2 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 3 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 4 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 5 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 6 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 7 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 8 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-892 9 Chicago Zone 01-Calumet IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-214 6 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2013-03-04   
331-229 5 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2013-08-25   
331-231 4 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-11-17   
331-231 6 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-11-09   
331-233 7 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-10-13   
331-237 6 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-01-19   
331-237 7 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-01-19   
331-238 A Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-238 1 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-03-01   
331-238 4 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-02-19   
331-238 5 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-02-19   
331-238 6 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2018-02-19   
331-239 6 Yorkville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-04-15   
331-252 A Warrenville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-252 6 Warrenville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-07-18   
331-253 3 Lemont IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-10-30   
331-254 5 Sugar Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-03-21   
331-260 A Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-260 1 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2019-03-29   
331-260 7 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2020-10-15   
331-279 6 Elmhurst IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2021-12-22   
331-285 6 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2022-07-04   
331-300 6 Aurora IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-09-02   
331-399 6 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2021-03-27   
331-426 2 Lemont IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2022-07-05   
331-702 7 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-16   
331-702 8 Naperville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-16   
331-757 2 Lemont IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-04-27   
331-903 4 Downers Grove IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2015-08-07   
464-565 A Bellwood IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2024-03-22   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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