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: 668

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-668 A Watertown MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
617-668 0 Watertown MA   145J TERRA NOVA TELECOM INC. 128   2021-01-18   
617-668 1 Watertown MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2020-06-21   
617-668 2 Watertown MA BRTNMACOVMD  7135 TC SYSTEMS, INC. 128   2020-02-13   
617-668 3 Watertown MA FRMNMAWARMD  7421 AT&T - LOCAL 128   2010-06-03   
617-668 4 Watertown MA FRMNMAWARMD  7421 AT&T - LOCAL 128   2015-09-14   
617-668 5 Watertown MA CMBRMA01DS5  7135 TC SYSTEMS, INC. 128   2016-02-15   
617-668 6 Watertown MA CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
617-668 7 Watertown MA BRTNMACOVMD  7135 TC SYSTEMS, INC. 128   2019-11-21   
617-668 8 Watertown MA BRTNMACOVMD  7135 TC SYSTEMS, INC. 128   2019-11-21   
617-668 9 Watertown MA   145J TERRA NOVA TELECOM INC. 128   2022-05-05   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.