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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-300 5 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-02-25   
312-300 6 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-02-25   
312-300 7 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2012-02-25   
312-300 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2012-02-21   
312-300 9 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2012-02-21   
312-301 A Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-302 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-303 A Wheeling IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-303 0 Wheeling IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-304 A Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-304 4 Hinsdale IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-305 A Northbrook West IL ELGNIL32CM0  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 0 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 1 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 2 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 3 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 4 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-305 9 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-306 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-307 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-308 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-309 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 AMERITECH ILLINOIS 358      
312-310 A Northbrook West IL ELGNIL32CM0  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-310 0 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-310 1 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-310 3 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-310 9 Northbrook West IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-312 A Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-03-22   
312-312 0 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-05-06   
312-312 1 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-05-06   
312-312 2 Chicago Zone 01-Calumet IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2018-05-04   
312-312 3 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-03-22   
312-312 4 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-05-06   
312-312 5 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-03-22   
312-312 6 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-05-06   
312-312 7 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-03-22   
312-312 8 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2018-05-06   
312-312 9 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2018-03-22   
312-313 A Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358      
312-313 0 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 1 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 2 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 3 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 4 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 5 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 6 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 7 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 8 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-313 9 Chicago Zone 01-Calumet IL   224C ONVOY, LLC 358   2015-01-09   
312-314 A Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 >>

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.