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.

Detroit Zone 3, MI

1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
313-252 A HGPKMITSDS0  9323 MICHIGAN BELL TEL CO 340      
313-257 A LIVNMIUX0MD  5562 METROPCS, INC. 340      
313-257 0 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 1 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 2 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 3 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 4 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 5 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 6 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 7 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 8 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-257 9 LIVNMIUX0MD  5562 METROPCS, INC. 340   2018-11-11   
313-281 A SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-281 0   145J TERRA NOVA TELECOM INC. 340   2022-04-05   
313-281 1 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2022-04-05   
313-281 2 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-281 3 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2025-01-17   
313-281 4 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2022-04-05   
313-281 5 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-281 6 FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2005-01-16   
313-281 7 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2025-01-17   
313-281 8 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-281 9 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340      
313-305 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 0 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 1 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 2 FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2005-11-07   
313-305 3 FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2006-01-10   
313-305 4 WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2008-04-03   
313-305 5 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 6 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 7 WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2008-11-03   
313-305 8 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-305 9 FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-312 A FLNTMICD0MD  829J PAETEC ITEL, LLC 340      
313-312 0 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-03-05   
313-312 1 FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2009-11-30   
313-312 2 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-02-15   
313-312 3 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-02-15   
313-312 4 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-03-12   
313-312 5 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-03-12   
313-312 6 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-03-30   
313-312 7 LIVNMIUX8MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-03-30   
313-312 8 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-06-26   
313-312 9 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2010-11-04   
313-314 A DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340      
313-314 0 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-314 1 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-314 2 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2016-06-12   
313-314 3 DTRTMIBLX4Y  991E BANDWIDTH.COM CLEC, LLC - MI 340   2017-05-29   

1 2 3 4 5 6 7 8 >>

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.