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: 781 [Rate centres in NPA 781] [Dial plan for NPA 781]

NXX: 537

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
781-537 A Woburn MA FRMNMAWARMD  7421 AT&T - LOCAL 128      
781-537 0 Woburn MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
781-537 1 Woburn MA FRMNMAWARMD  7421 AT&T - LOCAL 128      
781-537 2 Woburn MA SOVLMAABBMD  145J TERRA NOVA TELECOM INC. 128   2024-02-06   
781-537 3 Woburn MA   145J TERRA NOVA TELECOM INC. 128   2022-11-02   
781-537 5 Woburn MA FRMNMAWARMD  7421 AT&T - LOCAL 128      
781-537 6 Woburn MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2013-07-23   
781-537 7 Woburn MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-04-15   
781-537 8 Woburn MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2020-12-29   
781-537 9 Woburn MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.