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.

Westford, MA

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
978-850 2 CMBSMA01GT4  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2015-03-02   
978-850 3 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-07-01   
978-850 4 NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-12-05   
978-850 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-03-14   
978-850 6 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-03-14   
978-850 7 BSTPMALLZMD  506J TWILIO INTERNATIONAL, INC. 128   2020-12-19   
978-850 8 SOVLMAABKMD  616J LEAP TELECOM, LLC 128   2023-03-11   
978-850 9 SOVLMAABBMD  145J TERRA NOVA TELECOM INC. 128   2023-11-16   
978-923 A CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-923 0 CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-923 1 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-11-03   
978-923 2 CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-923 3 CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-923 4 CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
978-923 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-07-01   
978-923 6 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
978-923 7 BSTPMALLDS1  4536 XO MASSACHUSETS, INC. 128   2005-08-13   
978-923 8 BSTPMALLDS1  4536 XO MASSACHUSETS, INC. 128   2005-08-13   
978-923 9 CMBSMA01GT4  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2020-05-31   

<< 1 2 3 4

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.