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: 532

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-532 A Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 0 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 1 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 2 Prince Frederick MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-05-06   
443-532 3 Prince Frederick MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-04-15   
443-532 4 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 5 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 6 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 7 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 8 Prince Frederick MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-532 9 Prince Frederick MD   515J IP HORIZON LLC 238   2016-01-04   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.