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: 321 [Rate centres in NPA 321] [Dial plan for NPA 321]

NXX: 251

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
321-251 A Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806      
321-251 0 Orlando FL ORLDFLMAYEX  6889 OMNIPOINT MIAMI E LICENSE, LLC 45806   2004-11-20   
321-251 1 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806      
321-251 2 Orlando FL ORLFFLEJDMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45806   2005-01-06   
321-251 3 Orlando FL ORLFFLEJDMD  4802 LEVEL 3 COMMUNICATIONS, LLC - FL 45806   2005-01-06   
321-251 4 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806   2004-07-30   
321-251 5 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806   2004-07-30   
321-251 6 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806   2004-07-30   
321-251 7 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806   2004-07-30   
321-251 8 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806   2004-07-30   
321-251 9 Orlando FL ORLEFLIQDS0  7448 MCI WORLDCOM COMMUNICATIONS, INC. - FL 45806      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.