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: 704

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-704 A Odenton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-704 0 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 1 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 2 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-12-26   
443-704 3 Odenton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-04   
443-704 4 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-12-22   
443-704 5 Odenton MD BLTMMDCHCMD  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2024-12-20   
443-704 6 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-09-20   
443-704 7 Odenton MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2019-10-13   
443-704 8 Odenton MD   829J PAETEC ITEL, LLC 238      
443-704 9 Odenton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-08-26   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.