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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-850 9 Big Rock IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2021-10-01   
331-866 A Wheaton IL   516J TON80 COMMUNICATIONS LLC 358   2022-03-15   
331-866 2 Wheaton IL   516J TON80 COMMUNICATIONS LLC 358   2022-03-15   
331-867 A Yorkville IL CHCGILWURMD  965H FRACTEL LLC 358      
331-867 0 Yorkville IL   495J STRATUS NETWORKS 358   2020-10-03   
331-867 1 Yorkville IL   515J IP HORIZON LLC 358   2021-06-27   
331-867 2 Yorkville IL CHCGILNEXIX  506J TWILIO INTERNATIONAL INC 358   2021-04-13   
331-867 5 Yorkville IL CHCGILWURMD  965H FRACTEL LLC 358   2020-09-11   
331-867 6 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-09-12   
331-867 7 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-10-15   
331-867 8 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-09-12   
331-867 9 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2020-10-15   
331-871 A West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-871 0 West Chicago IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-07-16   
331-871 1 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-09-22   
331-871 2 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-12-06   
331-871 3 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-12-06   
331-871 4 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-04-28   
331-871 5 West Chicago IL CHCGILNEXJX  318J COMCAST IP PHONE LLC 358   2017-01-22   
331-871 6 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-04-28   
331-871 7 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-04-14   
331-871 8 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-04-14   
331-871 9 West Chicago IL CHCGILWUJMD  073H TELNYX LLC 358   2017-04-24   
331-888 A Warrenville IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
331-888 0 Warrenville IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-04-27   
331-888 1 Warrenville IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-04-27   
331-888 2 Warrenville IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-02-10   
331-888 3 Warrenville IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2014-02-10   
331-888 5 Warrenville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-14   
331-888 6 Warrenville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-14   
331-888 7 Warrenville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-888 8 Warrenville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-888 9 Warrenville IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2015-06-05   
331-899 A Lombard IL CHCGILWURMD  965H FRACTEL LLC 358   2021-02-19   
331-899 0 Lombard IL CHCGIL24MMD  515J IP HORIZON LLC 358   2021-06-14   
331-899 1 Lombard IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2021-08-17   
331-899 2 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 3 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 4 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 5 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 6 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 7 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 8 Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-03-01   
331-899 9 Lombard IL CHCGILWURMD  965H FRACTEL LLC 358   2021-02-19   
331-900 A Elmhurst IL CHCGILWURMD  965H FRACTEL LLC 358      
331-900 0 Elmhurst IL   965H FRACTEL LLC 358   2019-10-01   
331-900 1 Elmhurst IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2020-07-01   
331-900 2 Elmhurst IL CHCGIL24MMD  515J IP HORIZON LLC 358   2021-06-14   
331-900 3 Elmhurst IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-10-04   
331-900 4 Elmhurst IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-10-04   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 >>

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.