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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-226 A Boston MA CMBRMAWA0MD  3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 0 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 1 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 2 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 3 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 4 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 5 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 6 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      
617-226 7 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2004-11-25   
617-226 8 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2004-11-25   
617-226 9 Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.