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.

Switch: DTRTMIBAUMD

<< 1 2 3 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-756 A Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
313-756 2 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-12-18   
313-756 3 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-12-18   
313-756 4 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-12-18   
313-756 5 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-12-18   
313-880 2 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-05-27   
313-998 0 Detroit Zone 1 MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-11-08   
517-510 9 Clayton MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-06   
586-303 3 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-04-06   
586-310 A Mount Clemens MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
586-310 6 Mount Clemens MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2022-01-28   
586-316 A Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
586-316 3 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-30   
586-316 4 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-30   
586-316 5 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-30   
586-316 6 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-30   
586-316 7 Warren MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-09-30   
586-580 A Utica MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
586-580 5 Utica MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
734-343 0 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 1 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 2 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 5 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 6 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 7 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 8 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-343 9 Livonia MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2012-04-07   
734-496 6 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-03-12   
734-510 A Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
734-510 6 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-03-30   
734-510 7 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2021-03-30   
734-532 1 Romulus MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
734-570 6 Chelsea MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2024-03-18   
734-630 A Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 0 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 1 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 2 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 3 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 4 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 5 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 6 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 7 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 8 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-630 9 Ann Arbor MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2025-12-29   
734-774 5 Ida MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2022-01-13   
810-223 9 Flint MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
810-243 6 Flint MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-09-08   
810-254 A Grand Blanc MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340      
810-254 5 Grand Blanc MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-09-21   
810-254 6 Grand Blanc MI 770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 340   2020-09-21   

<< 1 2 3 >>

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.