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: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 336

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-336 A Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 0 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 1 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 2 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 3 Chelsea MA BSTPMALLDS1  4536 XO MASSACHUSETS, INC. 128   2005-12-03   
617-336 4 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 5 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
617-336 6 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-03-06   
617-336 7 Chelsea MA BSTPMALLDS1  4536 XO MASSACHUSETS, INC. 128   2005-12-03   
617-336 8 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2017-10-08   
617-336 9 Chelsea MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.