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
331-702 8 Naperville IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2014-10-16   
331-702 9 Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-12-10   
331-703 A West Chicago IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-703 0 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-21   
331-703 1 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-09-09   
331-703 2 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-09-09   
331-703 3 West Chicago IL CHCGIL24DS6  224C ONVOY, LLC 358   2014-04-17   
331-703 4 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-28   
331-703 5 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-28   
331-703 6 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2014-11-28   
331-703 7 West Chicago IL CHCGILDT8MD  508J CENTURYLINK COMMUNICATIONS, LLC 358   2014-02-25   
331-703 8 West Chicago IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-01-21   
331-703 9 West Chicago IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2013-12-19   
331-704 A Kaneville IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358      
331-704 0 Kaneville IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-20   
331-704 1 Kaneville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-11   
331-704 2 Kaneville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-704 3 Kaneville IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-704 4 Kaneville IL CHCGIL24DS6  224C ONVOY, LLC 358   2018-09-16   
331-704 7 Kaneville IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2018-09-17   
331-704 8 Kaneville IL CHCGILWUJMD  073H TELNYX LLC 358   2018-06-28   
331-704 9 Kaneville IL CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-26   
331-707 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-707 0 Aurora IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2017-07-06   
331-707 1 Aurora IL CHCGILCLXOX  516C AT&T CORP. 358   2016-10-21   
331-707 2 Aurora IL WCHCILBFGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-04-18   
331-707 3 Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2017-01-06   
331-707 4 Aurora IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-09   
331-707 5 Aurora IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2017-09-08   
331-707 6 Aurora IL WCHCILBFGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-08-21   
331-707 7 Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-10-20   
331-707 8 Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-10-20   
331-707 9 Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-10-20   
331-716 A Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-716 0 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-07-10   
331-716 1 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-03   
331-716 2 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-03   
331-716 3 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-03   
331-716 4 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-716 5 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-716 6 Wheaton IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-01   
331-716 7 Wheaton IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2016-08-08   
331-716 8 Wheaton IL   515J IP HORIZON LLC 358   2016-08-09   
331-716 9 Wheaton IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-08-18   
331-717 A Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-717 0 Oswego IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-06   
331-717 1 Oswego IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-03-06   
331-717 2 Oswego IL CHCGIL24DS6  224C ONVOY, LLC 358   2016-05-29   
331-717 3 Oswego IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2016-07-18   
331-717 4 Oswego IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-07-14   
331-717 5 Oswego IL CHCGIL24DS6  224C ONVOY, LLC 358   2019-07-14   
331-717 6 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-12-28   
331-717 7 Oswego IL CHCGILWUJMD  073H TELNYX LLC 358   2017-04-24   
331-717 8 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-08-21   
331-717 9 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-03-03   
331-725 A Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-725 0 Oswego IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-09-10   
331-725 1 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-10-10   
331-725 2 Oswego IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-10-30   
331-725 3 Oswego IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-11-10   
331-725 4 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-03-01   
331-725 5 Oswego IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-10-16   
331-725 6 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-08-08   
331-725 7 Oswego IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-11   
331-725 8 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2010-03-12   
331-725 9 Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-07-12   
331-732 A Geneva IL CHCGILWURMD  965H FRACTEL, LLC 358      
331-732 0 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-02-18   
331-732 1 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-02-18   
331-732 2 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-02-18   
331-732 3 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-02-18   
331-732 4 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-02-18   
331-732 5 Geneva IL CHCGILWURMD  965H FRACTEL, LLC 358   2019-12-12   
331-732 6 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-03-22   
331-732 7 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-03-22   
331-732 8 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-03-22   
331-732 9 Geneva IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2020-03-22   
331-746 A Kaneville IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358      
331-746 0 Kaneville IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-04-19   
331-746 2 Kaneville IL CHCGILCLXOX  516C AT&T CORP. 358   2023-10-02   
331-746 7 Kaneville IL CHCGILWUTMD  516J TON80 COMMUNICATIONS, LLC 358   2022-04-21   
331-757 A Lemont IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-757 0 Lemont IL CHCGILWUJMD  073H TELNYX LLC 358   2017-04-24   
331-757 1 Lemont IL CHCGIL24DS6  224C ONVOY, LLC 358   2017-06-23   
331-757 2 Lemont IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-04-27   
331-757 3 Lemont IL CHCGIL24DS6  224C ONVOY, LLC 358   2018-01-15   
331-757 4 Lemont IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2017-05-15   
331-757 5 Lemont IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2016-09-12   
331-757 6 Lemont IL CHCGIL24DS6  224C ONVOY, LLC 358   2018-01-15   
331-757 7 Lemont IL CHCGILCLXOX  516C AT&T CORP. 358   2016-10-24   
331-757 8 Lemont IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-09-11   
331-757 9 Lemont IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2016-09-11   
331-758 A Aurora IL CHCGILWURMD  965H FRACTEL, LLC 358      
331-758 0 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-05-29   
331-758 1 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-05-29   
331-758 2 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-05-29   
331-758 3 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-05-29   
331-758 4 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-07-02   
331-758 5 Aurora IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2022-07-02   
331-758 6 Aurora IL CHCGILWURMD  965H FRACTEL, LLC 358   2021-12-30   

<< 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: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.