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: 327

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-327 A Aberdeen MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
443-327 0 Aberdeen MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
443-327 1 Aberdeen MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 236      
443-327 2 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-327 3 Aberdeen MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-327 4 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-327 5 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-327 6 Aberdeen MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 236      
443-327 7 Aberdeen MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 236      
443-327 8 Aberdeen MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 236      
443-327 9 Aberdeen MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 236      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.