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: 774 [Rate centres in NPA 774] [Dial plan for NPA 774]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
774-521 A Osterville MA BRTNMACR0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      
774-521 0 Osterville MA BRTNMACRLMD  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2004-12-15   
774-521 1 Osterville MA BRTNMACR0MD  3370 CTC COMMUNICATIONS CORP. - MA 128   2001-10-15   
774-521 2 Osterville MA BRTNMACRLMD  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-07-24   
774-521 3 Osterville MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2008-09-25   
774-521 4 Osterville MA BRTNMACRLMD  5562 METROPCS, INC. 128   2006-06-07   
774-521 5 Osterville MA BRTNMACRLMD  5562 METROPCS, INC. 128   2005-09-07   
774-521 6 Osterville MA BRTNMACRLMD  5562 METROPCS, INC. 128   2004-12-22   
774-521 7 Osterville MA BRTNMACRLMD  5562 METROPCS, INC. 128   2004-05-13   
774-521 8 Osterville MA BRTNMACRLMD  5562 METROPCS, INC. 128   2003-09-08   
774-521 9 Osterville MA BRTNMACRLMD  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-02-12   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.