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.

OCN: 6120 LEVEL 3 COMMUNICATIONS, LLC - MI

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
313-244 0 Detroit Zone 5 MI SFLDMIDNDS6  340   2008-01-29   
313-254 A Detroit Zone 6 MI SFLDMIDNDS6  340      
313-254 0 Detroit Zone 6 MI SFLDMIDNDS6  340   2006-01-16   
313-254 4 Detroit Zone 6 MI SFLDMIDNDS6  340      
313-263 A Detroit Zone 1 MI   340      
313-263 3 Detroit Zone 1 MI SFLDMIDNDS6  340   2004-08-12   
313-263 4 Detroit Zone 1 MI SFLDMIDNDS6  340   2004-07-12   
313-263 5 Detroit Zone 1 MI SFLDMIDNDS6  340   2014-03-03   
313-263 6 Detroit Zone 1 MI SFLDMIDNDS6  340   2020-09-04   
313-265 2 Detroit Zone 1 MI SFLDMIDNDS6  340   2013-09-06   
313-279 A Detroit Zone 4 MI SFLDMIDNDS6  340      
313-279 0 Detroit Zone 4 MI SFLDMIDNDS6  340      
313-279 1 Detroit Zone 4 MI SFLDMIDNDS6  340      
313-279 5 Detroit Zone 4 MI SFLDMIDNDS6  340      
313-279 6 Detroit Zone 4 MI SFLDMIDNDS6  340      
313-281 A Detroit Zone 3 MI SFLDMIDNDS6  340      
313-281 2 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-281 5 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-281 8 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-281 9 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-329 2 Detroit Zone 1 MI SFLDMIDNDS6  340   2014-10-24   
313-329 5 Detroit Zone 1 MI SFLDMIDNDS6  340   2017-10-22   
313-332 A Detroit Zone 2 MI SFLDMIDNDS6  340      
313-332 4 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-334 A Detroit Zone 3 MI SFLDMIDNDS6  340      
313-334 3 Detroit Zone 3 MI SFLDMIDNDS6  340   2005-02-24   
313-334 4 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-334 6 Detroit Zone 3 MI SFLDMIDNDS6  340   2006-01-05   
313-334 7 Detroit Zone 3 MI SFLDMIDNDS6  340   2006-01-05   
313-335 3 Detroit Zone 1 MI SFLDMIDNDS6  340   2016-07-22   
313-344 A Detroit Zone 2 MI SFLDMIDNDS6  340      
313-344 3 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-346 A Detroit Zone 3 MI SFLDMIDNDS6  340      
313-346 5 Detroit Zone 3 MI SFLDMIDNDS6  340   2004-11-22   
313-346 8 Detroit Zone 3 MI SFLDMIDNDS6  340      
313-380 5 Detroit Zone 6 MI SFLDMIDNDS6  340   2021-03-13   
313-398 2 Detroit Zone 1 MI SFLDMIDNDS6  340   2015-12-17   
313-406 7 Detroit Zone 6 MI SFLDMIDNDS6  340   2005-09-22   
313-406 8 Detroit Zone 6 MI SFLDMIDNDS6  340   2005-09-22   
313-426 7 Detroit Zone 1 MI SFLDMIDNDS6  340   2017-03-18   
313-426 9 Detroit Zone 1 MI SFLDMIDNDS6  340   2017-07-08   
313-429 0 Detroit Zone 6 MI SFLDMIDNDS6  340   2006-07-03   
313-429 1 Detroit Zone 6 MI SFLDMIDNDS6  340   2006-07-03   
313-432 A Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 0 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 1 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 2 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 5 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 6 Detroit Zone 2 MI SFLDMIDNDS6  340      
313-432 7 Detroit Zone 2 MI SFLDMIDNDS6  340      

<< 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 >>

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.