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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-808 2 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-04-06   
331-808 3 Plano IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-07-11   
331-808 4 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-03-01   
331-808 5 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-09-06   
331-808 6 Plano IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-02-12   
331-808 7 Plano IL CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-26   
331-808 8 Plano IL CHCGILWUJMD  073H TELNYX LLC 358   2018-06-28   
331-808 9 Plano IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-11-19   
331-814 A Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-814 0 Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2015-11-13   
331-814 1 Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-10-08   
331-814 2 Naperville IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2015-08-24   
331-814 3 Naperville IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2015-10-11   
331-814 4 Naperville IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2015-11-13   
331-814 5 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-08-23   
331-814 6 Naperville IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-07-25   
331-814 7 Naperville IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-07-25   
331-814 8 Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-10-08   
331-814 9 Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2015-08-23   
331-825 A Geneva IL   972C DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL 358      
331-826 A Elmhurst IL ELGNILOTGT5  5562 METROPCS, INC. 358      
331-826 0 Elmhurst IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2009-06-30   
331-826 1 Elmhurst IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-11-02   
331-826 2 Elmhurst IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-09-07   
331-826 3 Elmhurst IL CHCGIL24DS6  224C ONVOY, LLC 358   2010-09-07   
331-826 4 Elmhurst IL ELGNILOTGT5  5562 METROPCS, INC. 358   2010-09-20   
331-826 5 Elmhurst IL ELGNILOTGT5  5562 METROPCS, INC. 358   2010-09-20   
331-826 6 Elmhurst IL ELGNILOTGT5  5562 METROPCS, INC. 358   2010-09-20   
331-826 7 Elmhurst IL ELGNILOTGT5  5562 METROPCS, INC. 358   2010-09-20   
331-826 8 Elmhurst IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-02-25   
331-826 9 Elmhurst IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2009-01-22   
331-837 A West Chicago IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
331-837 0 West Chicago IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-08-19   
331-837 1 West Chicago IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-08-19   
331-837 2 West Chicago IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2022-10-24   
331-837 3 West Chicago IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2022-10-24   
331-837 4 West Chicago IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-03-10   
331-837 5 West Chicago IL   224C ONVOY, LLC 358   2025-04-06   
331-837 7 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-01   
331-837 8 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-07-22   
331-837 9 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2024-03-01   
331-850 A Big Rock IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-850 1 Big Rock IL CHCGILWUKMD  939H COMMIO, LLC 358   2022-02-24   
331-850 3 Big Rock IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2024-04-18   
331-850 5 Big Rock IL CHCGIL24DS6  224C ONVOY, LLC 358   2021-08-09   
331-850 8 Big Rock IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2021-06-27   
331-850 9 Big Rock IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2021-10-01   
331-866 A Wheaton IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
331-866 0 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
331-866 1 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
331-866 2 Wheaton IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-03-15   
331-866 3 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2022-12-12   
331-866 4 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2022-12-12   
331-866 5 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2022-12-12   
331-866 6 Wheaton IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2023-02-11   
331-866 7 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
331-866 8 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
331-866 9 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2022-11-17   
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 3 Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358   2023-05-14   
331-867 4 Yorkville IL CHCGILCNHMD  073H TELNYX LLC 358   2023-05-28   
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      
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   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 >>

Last updated: Fri, 25 Jul 2025 03:21:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.