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: 478 [Rate centres in NPA 478] [Dial plan for NPA 478]

NXX: 401

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
478-401 A Millen GA AGSTGAMT05Z  318J COMCAST IP PHONE, LLC 442      
478-401 0 Millen GA AGSTGAMT05Z  318J COMCAST IP PHONE, LLC 442   2010-09-20   
478-401 1 Millen GA AGSTGAMTXMY  983E BANDWIDTH.COM CLEC, LLC - GA 442   2011-10-01   
478-401 2 Millen GA AGSTGAMTXSY  067D ONVOY, LLC - GA 442   2013-12-27   
478-401 3 Millen GA AGSTGAMTXMY  983E BANDWIDTH.COM CLEC, LLC - GA 442   2014-02-20   
478-401 4 Millen GA AGSTGAMTXMY  983E BANDWIDTH.COM CLEC, LLC - GA 442   2015-02-14   
478-401 5 Millen GA AGSTGAMTXFZ  516C AT&T CORP. 442   2013-11-08   
478-401 6 Millen GA AGSTGAEFIMD  7435 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 442   2016-07-20   
478-401 7 Millen GA AGSTGAMTXIZ  508J CENTURYLINK COMMUNICATIONS, LLC 442   2015-10-17   
478-401 8 Millen GA AGSTGAMTXSY  067D ONVOY, LLC - GA 442   2016-04-05   
478-401 9 Millen GA AGSTGAMTXSY  067D ONVOY, LLC - GA 442   2016-04-05   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.