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: 609

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-609 A Sykesville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-609 0 Sykesville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-609 1 Sykesville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-609 2 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-609 3 Sykesville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-609 4 Sykesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-609 5 Sykesville MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-609 6 Sykesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-609 7 Sykesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-609 8 Sykesville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-609 9 Sykesville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.