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: 486

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-486 A Prince Frederick MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-486 0 Prince Frederick MD   145J TERRA NOVA TELECOM INC. 238      
443-486 1 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-486 2 Prince Frederick MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-486 3 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-486 4 Prince Frederick MD PRFRMDPFRS1  9212 VERIZON MARYLAND, INC. 238      
443-486 5 Prince Frederick MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-486 6 Prince Frederick MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-486 7 Prince Frederick MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-486 8 Prince Frederick MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-486 9 Prince Frederick MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.