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: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-321 A Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 0 Watertown MA   829J PAETEC ITEL, LLC 128   2016-01-08   
617-321 1 Watertown MA   829J PAETEC ITEL, LLC 128   2006-08-04   
617-321 2 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 3 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 4 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 5 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 6 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 7 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 8 Watertown MA   829J PAETEC ITEL, LLC 128      
617-321 9 Watertown MA   829J PAETEC ITEL, LLC 128      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.