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: DTRTMIRVDS0

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
313-567 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-568 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 0 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 2 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 3 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 5 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-656 6 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-665 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-667 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 A Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 0 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 4 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 5 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 6 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 7 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 8 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      
313-877 9 Detroit Zone 1 MI 9323 MICHIGAN BELL TEL CO 340      

<< 1 2

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.