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: DRBRMIDBDS0

Remotes:

Switch Switch name Switch type
MONRMINERSA  MONROE  5ER 
NBTNMIMNRSA  NEW BOSTON  5ER 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-274 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 0 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 1 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 2 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 3 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 4 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 5 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 6 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 7 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-277 8 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-278 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 0 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 1 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 2 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 3 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 4 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 5 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 6 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 7 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-359 9 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-561 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-562 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-563 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-565 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 0 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 1 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 4 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 5 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 8 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-724 9 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 0 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 1 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 2 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 3 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 5 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 6 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 7 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 8 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-730 9 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 0 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 2 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 3 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 5 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 6 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 8 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-791 9 Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      
313-792 A Detroit Zone 6 MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.