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.

NPA: 810 [Rate centres in NPA 810] [Dial plan for NPA 810]

NXX: 378

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-378 A Peck MI CRSWMIMNRSA  9323 MICHIGAN BELL TEL CO 340      
810-378 0 Peck MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-03-04   
810-378 1 Peck MI DTRTMIBASMD  516C AT&T CORP. 340   2011-05-31   
810-378 2 Peck MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-04-02   
810-378 3 Peck MI FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2009-11-16   
810-378 4 Peck MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2012-07-13   
810-378 5 Peck MI CRSWMIMNRSA  9323 MICHIGAN BELL TEL CO 340      
810-378 6 Peck MI   279B CLEAR RATE COMMUNICATIONS, INC. - MI 340   2010-06-12   
810-378 8 Peck MI FLNTMICD0MD  829J PAETEC ITEL, LLC 340   2004-03-09   
810-378 9 Peck MI SFLDMITODS2  543C ONVOY, LLCV - MI 340   2016-04-02   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.