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: 419

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-419 A Glenwood MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-419 0 Glenwood MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-419 1 Glenwood MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-419 2 Glenwood MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-419 3 Glenwood MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-419 4 Glenwood MD   876D ONVOY, LLC - MD 238      
443-419 5 Glenwood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-419 6 Glenwood MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-419 7 Glenwood MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-419 8 Glenwood MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
443-419 9 Glenwood MD   515J IP HORIZON LLC 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.