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: 690

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-690 A Milton MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-690 0 Milton MA   145J TERRA NOVA TELECOM INC. 128   2025-10-04   
617-690 1 Milton MA   624H ONVOY SPECTRUM, LLC 128   2021-11-11   
617-690 2 Milton MA   318J COMCAST IP PHONE, LLC 128   2006-10-26   
617-690 3 Milton MA   318J COMCAST IP PHONE, LLC 128   2006-10-26   
617-690 4 Milton MA   624H ONVOY SPECTRUM, LLC 128   2021-12-21   
617-690 5 Milton MA   892D ONVOY, LLC - MA 128   2023-07-08   
617-690 6 Milton MA   829J PAETEC ITEL, LLC 128   2006-05-19   
617-690 7 Milton MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-06-03   
617-690 8 Milton MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-06-03   
617-690 9 Milton MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2011-06-01   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.