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: 522

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-522 A Reisterstown MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-522 0 Reisterstown MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-522 1 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-06-14   
443-522 2 Reisterstown MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2012-05-26   
443-522 3 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2013-10-11   
443-522 4 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-03-27   
443-522 5 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-04-30   
443-522 6 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-08-22   
443-522 7 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-09-26   
443-522 8 Reisterstown MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2015-01-26   
443-522 9 Reisterstown MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.