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: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
810-344 A Grand Blanc MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340      
810-344 0 Grand Blanc MI DTRTMIDJCMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 340   2014-02-02   
810-344 1 Grand Blanc MI ANARMIMNX8X  3535 ACD TELECOM, INC. - MI 340   2005-07-23   
810-344 2 Grand Blanc MI DTRTMIBHMMD  1200 TALK AMERICA INC. - MI 340   2005-08-13   
810-344 3 Grand Blanc MI SFLDMIDC0MD  4632 TELNET WORLDWIDE, INC. 340   2005-09-04   
810-344 4 Grand Blanc MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2006-02-11   
810-344 5 Grand Blanc MI ANARMIMNX8X  3535 ACD TELECOM, INC. - MI 340   2006-09-26   
810-344 6 Grand Blanc MI SFLDMIDNDS6  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 340   2007-08-11   
810-344 7 Grand Blanc MI DTRTMIBASMD  516C AT&T CORP. 340   2006-06-30   
810-344 8 Grand Blanc MI SFLDMIQJDS1  7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 340   2005-03-19   
810-344 9 Grand Blanc MI WAYNMIMNXUX  318J COMCAST IP PHONE, LLC 340   2006-02-09   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.