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: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 719

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-719 A Jarrettsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-719 0 Jarrettsville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-719 1 Jarrettsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-719 2 Jarrettsville MD BLTMMDCHXMX  506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
443-719 4 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-30   
443-719 5 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 6 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 7 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
443-719 8 Jarrettsville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-719 9 Jarrettsville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.