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: 313 [Rate centres in NPA 313] [Dial plan for NPA 313]

<< 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 99 100 101 102 103 104 105 106 107 108 109 110 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
313-746 7 Detroit Zone 1 MI   516J TON80 COMMUNICATIONS, LLC 340   2022-04-21   
313-746 8 Detroit Zone 1 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2022-06-03   
313-746 9 Detroit Zone 1 MI   624H ONVOY SPECTRUM, LLC 340   2022-08-08   
313-747 A Detroit Zone 4 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340      
313-747 0 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-07-09   
313-747 1 Detroit Zone 4 MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2018-03-15   
313-747 2 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-10-12   
313-747 3 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-10-12   
313-747 4 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-10-12   
313-747 5 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-10-12   
313-747 6 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-07-09   
313-747 7 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-07-09   
313-747 8 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-07-09   
313-747 9 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2015-07-09   
313-748 A Detroit Zone 1 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-748 1 Detroit Zone 1 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-748 2 Detroit Zone 1 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2006-08-12   
313-748 3 Detroit Zone 1 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2006-08-12   
313-748 4 Detroit Zone 1 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-748 5 Detroit Zone 1 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2006-08-12   
313-748 6 Detroit Zone 1 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-748 7 Detroit Zone 1 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-748 8 Detroit Zone 1 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2006-08-12   
313-748 9 Detroit Zone 1 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 A Detroit Zone 6 MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 0 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 1 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 2 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 3 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 4 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 5 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 6 Detroit Zone 6 MI   7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
313-749 7 Detroit Zone 6 MI   318J COMCAST IP PHONE, LLC 340   2013-09-16   
313-749 8 Detroit Zone 6 MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2014-04-14   
313-749 9 Detroit Zone 6 MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2008-07-17   
313-750 A Detroit Zone 4 MI LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-07-06   
313-750 0 Detroit Zone 4 MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 340   2024-11-20   
313-750 1 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2024-08-29   
313-750 2 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2025-07-28   
313-750 3 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-07-06   
313-750 4 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-07-06   
313-750 5 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2025-07-21   
313-750 6 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2025-10-18   
313-750 7 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2025-12-17   
313-750 8 Detroit Zone 4 MI   490J DISH WIRELESS, LLC 340   2025-12-17   
313-750 9 Detroit Zone 4 MI   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2024-07-06   
313-751 A Detroit Zone 5 MI SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340      
313-751 0 Detroit Zone 5 MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-02-11   
313-751 1 Detroit Zone 5 MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-02-11   
313-751 2 Detroit Zone 5 MI   991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-02-11   

<< 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 99 100 101 102 103 104 105 106 107 108 109 110 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.