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 1, MI

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
313-426 6 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340   2017-07-09   
313-426 7 DTRTMIBHGMD  156J RCLEC, INC. 340   2017-03-18   
313-426 8 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2017-07-13   
313-426 9 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2017-07-08   
313-430 A CMPTMIIFCM0  9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-442 A DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 0 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 1 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 2 LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-04-30   
313-442 3 LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-04-30   
313-442 4 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 5 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 6 LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-09-16   
313-442 7 SFLDMITODS2  543C ONVOY, LLCV - MI 340   2015-09-05   
313-442 8 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-442 9 DTRTMIBHDS1  9323 MICHIGAN BELL TEL CO 340      
313-446 A DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 0 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 1 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 2 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 3 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 4 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 5 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 6 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 7 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-446 8 SFLDMIDICA0  2550 123.NET, INC. 340   2011-09-26   
313-446 9 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-448 A DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340      
313-448 0 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 1 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 2 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 3 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 4 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 5 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 6 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 7 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 8 DTRTMIRVDS0  9323 MICHIGAN BELL TEL CO 340   2011-01-08   
313-448 9 SFLDMIDICA0  2550 123.NET, INC. 340   2011-02-21   
313-456 A DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 0 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 1 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 2 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 3 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 4 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 5 LIVNMIUX0MD  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 340   2010-09-16   
313-456 6 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 7 DTRTMIMDRPA  9323 MICHIGAN BELL TEL CO 340      
313-456 8 SFLDMIMNXRX  991E BANDWIDTH.COM CLEC, LLC - MI 340   2019-05-09   
313-456 9 SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2011-09-16   
313-459 A LIVNMIUX0MD  5562 METROPCS, INC. 340      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.