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: 380

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-380 A Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 0 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-380 1 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-380 2 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 3 Woodlawn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-380 4 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-380 5 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-380 6 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-380 7 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-380 8 Woodlawn MD WDLWMDWLDS0  9212 VERIZON MARYLAND, INC. 238      
443-380 9 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.