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: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

<< 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 38 39 40 41 42 43 44 45 46 47 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-566 3 Chicago Zone 01-Wabash IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2014-04-13   
312-566 4 Chicago Zone 01-Wabash IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2014-05-10   
312-566 5 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-566 6 Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
312-566 7 Chicago Zone 01-Wabash IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-566 8 Chicago Zone 01-Wabash IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-566 9 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-567 A Chicago Zone 01-Calumet IL CHCGILCADS0  9329 ILLINOIS BELL TEL CO 358      
312-568 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 0 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 1 Chicago Zone 01-Canal IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2006-11-27   
312-568 2 Chicago Zone 01-Canal IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2005-11-17   
312-568 3 Chicago Zone 01-Canal IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2005-11-17   
312-568 4 Chicago Zone 01-Canal IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2006-04-27   
312-568 5 Chicago Zone 01-Canal IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2005-10-02   
312-568 6 Chicago Zone 01-Canal IL ELGNILOTGT5  5562 METROPCS, INC. 358   2011-01-05   
312-568 7 Chicago Zone 01-Canal IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2006-12-13   
312-568 8 Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-568 9 Chicago Zone 01-Canal IL ELGNILOTGT5  5562 METROPCS, INC. 358   2011-01-05   
312-569 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-569 0 Chicago Zone 01-Monroe IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-569 1 Chicago Zone 01-Monroe IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2002-06-24   
312-569 2 Chicago Zone 01-Monroe IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-02-05   
312-569 3 Chicago Zone 01-Monroe IL CHCGIL24DS6  224C ONVOY, LLC 358   2002-06-24   
312-569 4 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358   2002-06-24   
312-569 5 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-569 6 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-569 7 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-569 8 Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-569 9 Chicago Zone 01-Monroe IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-570 A Chicago Zone 01-Calumet IL CHCGILCADS0  9329 ILLINOIS BELL TEL CO 358      
312-571 A Chicago Zone 01-Wabash IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-572 A Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 0 Chicago Zone 01-Monroe IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-02-05   
312-572 1 Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 2 Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 3 Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 4 Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 5 Chicago Zone 01-Monroe IL CHCGILMODS0  9329 ILLINOIS BELL TEL CO 358      
312-572 6 Chicago Zone 01-Monroe IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-09-29   
312-572 7 Chicago Zone 01-Monroe IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2007-12-14   
312-572 8 Chicago Zone 01-Monroe IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2009-09-29   
312-572 9 Chicago Zone 01-Monroe IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-573 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-574 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-574 0 Chicago Zone 01-Franklin IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-574 1 Chicago Zone 01-Franklin IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2010-07-15   
312-574 2 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358      
312-574 3 Chicago Zone 01-Franklin IL CHCGILWBXDZ  984E BANDWIDTH.COM CLEC, LLC - IL 358   2011-01-16   
312-574 4 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358      
312-574 5 Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-574 6 Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-574 7 Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-574 8 Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 ILLINOIS BELL TEL CO 358      
312-574 9 Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 ILLINOIS BELL TEL CO 358      
312-575 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-576 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-577 A Chicago Zone 01-Wabash IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
312-578 A Chicago Zone 01-Franklin IL CHCGILFRDS3  9329 ILLINOIS BELL TEL CO 358      
312-579 A Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-579 0 Chicago Zone 01-Calumet IL CHCGILWUJMD  073H TELNYX LLC 358   2017-09-09   
312-579 1 Chicago Zone 01-Calumet IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2017-11-06   
312-579 2 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2017-09-09   
312-579 3 Chicago Zone 01-Calumet IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2017-09-09   
312-579 4 Chicago Zone 01-Calumet IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358   2017-10-27   
312-579 5 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-09-08   
312-579 6 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-09-08   
312-579 7 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-09-08   
312-579 8 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-09-08   
312-579 9 Chicago Zone 01-Calumet IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2017-09-08   
312-580 A Chicago Zone 01-Franklin IL CHCGILFRDS4  9329 ILLINOIS BELL TEL CO 358      
312-581 A Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-581 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-10-12   
312-581 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-10-12   
312-581 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-10-12   
312-581 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-10-12   
312-581 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358   2017-10-12   
312-581 5 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-09-21   
312-581 6 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-09-21   
312-581 7 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-09-21   
312-581 8 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-09-21   
312-581 9 Chicago Zone 01-Calumet IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2017-09-21   
312-582 A Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358      
312-582 0 Chicago Zone 01-Wabash IL ELGNILOTGT5  5562 METROPCS, INC. 358   2011-01-05   
312-582 1 Chicago Zone 01-Wabash IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2009-03-03   
312-582 2 Chicago Zone 01-Wabash IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2010-07-15   
312-582 3 Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-15   
312-582 4 Chicago Zone 01-Wabash IL DWGVILMCPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2011-01-05   
312-582 5 Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-15   
312-582 6 Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-15   
312-582 7 Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-15   
312-582 8 Chicago Zone 01-Wabash IL CHCGILWBDS0  9329 ILLINOIS BELL TEL CO 358   2002-06-15   
312-583 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 0 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 1 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 2 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 3 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 4 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 5 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-583 6 Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      

<< 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 38 39 40 41 42 43 44 45 46 47 >>

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.