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: 773 [Rate centres in NPA 773] [Dial plan for NPA 773]

<< 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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
773-379 2 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 3 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 4 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 5 Chicago Zone 05-Austin IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 6 Chicago Zone 05-Austin IL CHCGIL24XMD  495J STRATUS NETWORKS 358   2020-09-20   
773-379 7 Chicago Zone 05-Austin IL CHCGILAURP0  9329 ILLINOIS BELL TEL CO 358      
773-379 8 Chicago Zone 05-Austin IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-22   
773-379 9 Chicago Zone 05-Austin IL CHCGILIDXDX  624H ONVOY SPECTRUM, LLC 358   2024-10-14   
773-380 A Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 0 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 1 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 2 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 3 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 4 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 5 Chicago Zone 03-Newcastle IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2024-09-08   
773-380 6 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 7 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 8 Chicago Zone 03-Newcastle IL PRRGILXLDS0  9329 ILLINOIS BELL TEL CO 358      
773-380 9 Chicago Zone 03-Newcastle IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2019-10-30   
773-381 A Chicago Zone 02-Rogers Park IL CHCGILRPDS0  9329 ILLINOIS BELL TEL CO 358      
773-382 A Chicago Zone 09-South Chicago IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
773-382 0 Chicago Zone 09-South Chicago IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-10-25   
773-382 1 Chicago Zone 09-South Chicago IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-08-22   
773-382 2 Chicago Zone 09-South Chicago IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2004-04-06   
773-382 3 Chicago Zone 09-South Chicago IL CHCGILDTKMD  5447 ACCESS ONE, INC. - IL 358   2006-01-20   
773-382 4 Chicago Zone 09-South Chicago IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358   2003-03-26   
773-382 5 Chicago Zone 09-South Chicago IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358      
773-382 6 Chicago Zone 09-South Chicago IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-382 7 Chicago Zone 09-South Chicago IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-382 8 Chicago Zone 09-South Chicago IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-01-13   
773-382 9 Chicago Zone 09-South Chicago IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
773-383 A Chicago Zone 03-Kildare IL BFGVILASG00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
773-384 A Chicago Zone 04-Humboldt IL CHCGILHBDS1  9329 ILLINOIS BELL TEL CO 358      
773-385 A Chicago Zone 05-Merrimac IL CHCGILMEDS0  9329 ILLINOIS BELL TEL CO 358      
773-386 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 0 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 1 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 2 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 3 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 4 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 5 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 6 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 7 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 8 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-386 9 Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-387 A Chicago Zone 10-Pullman IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
773-387 0 Chicago Zone 10-Pullman IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-08-01   
773-387 1 Chicago Zone 10-Pullman IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-08-01   
773-387 2 Chicago Zone 10-Pullman IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-08-01   
773-387 3 Chicago Zone 10-Pullman IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358   2004-08-01   

<< 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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.