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: 544

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-544 A Everett MA   829J PAETEC ITEL, LLC 128      
617-544 0 Everett MA   892D ONVOY, LLC - MA 128   2019-02-08   
617-544 1 Everett MA   892D ONVOY, LLC - MA 128   2010-03-15   
617-544 2 Everett MA   892D ONVOY, LLC - MA 128   2019-07-01   
617-544 3 Everett MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-04   
617-544 4 Everett MA   7135 TC SYSTEMS, INC. 128   2002-05-18   
617-544 5 Everett MA   321J HD CARRIER LLC 128   2016-04-11   
617-544 6 Everett MA   829J PAETEC ITEL, LLC 128      
617-544 7 Everett MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-02-19   
617-544 8 Everett MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2011-08-27   
617-544 9 Everett MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2016-07-21   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.