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: 714

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-714 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-714 0 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-714 1 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-02-23   
443-714 2 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-714 3 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-714 4 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-714 5 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-29   
443-714 6 Annapolis MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-13   
443-714 7 Annapolis MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-09-17   
443-714 8 Annapolis MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-05-12   
443-714 9 Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-01-24   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.