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: 445

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-445 A Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-445 0 Elkridge MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-445 1 Elkridge MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
443-445 2 Elkridge MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-445 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-445 6 Elkridge MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-445 7 Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-445 8 Elkridge MD EKRGMDELDS0  9212 VERIZON MARYLAND, INC. 238      
443-445 9 Elkridge MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.