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: 332

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-332 A Crofton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-332 0 Crofton MD   829J PAETEC ITEL, LLC 238      
443-332 1 Crofton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-12   
443-332 2 Crofton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-08-30   
443-332 3 Crofton MD   876D ONVOY, LLC - MD 238   2024-03-03   
443-332 4 Crofton MD   829J PAETEC ITEL, LLC 238   2002-07-12   
443-332 5 Crofton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-08-30   
443-332 6 Crofton MD   829J PAETEC ITEL, LLC 238   2006-03-28   
443-332 7 Crofton MD   876D ONVOY, LLC - MD 238   2021-04-29   
443-332 8 Crofton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-11-29   
443-332 9 Crofton MD   876D ONVOY, LLC - MD 238   2021-04-29   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.