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: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-392 A Cataumet MA STHMMAGBGT0  7619 RCN TELECOM SERVICES, INC. - MA 128      
508-392 0 Cataumet MA   515J IP HORIZON LLC 128   2015-10-18   
508-392 1 Cataumet MA   515J IP HORIZON LLC 128   2016-06-26   
508-392 2 Cataumet MA   829J PAETEC ITEL, LLC 128   2005-11-18   
508-392 4 Cataumet MA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2012-11-30   
508-392 5 Cataumet MA   892D ONVOY, LLC - MA 128   2016-03-31   
508-392 6 Cataumet MA   892D ONVOY, LLC - MA 128   2016-03-31   
508-392 7 Cataumet MA   508J CENTURYLINK COMMUNICATIONS, LLC 128   2014-04-25   
508-392 8 Cataumet MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
508-392 9 Cataumet MA   318J COMCAST IP PHONE, LLC 128   2006-10-30   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.