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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-565 A Randallstown MD HNVAMDBHRS0  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 0 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 1 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 2 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2015-10-09   
443-565 3 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 4 Randallstown MD   876D ONVOY, LLC - MD 238   2016-04-28   
443-565 5 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 6 Randallstown MD   876D ONVOY, LLC - MD 238   2016-04-28   
443-565 7 Randallstown MD   7575 CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-565 8 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-565 9 Randallstown MD   3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.