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.

Sterling, MA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
978-286 A CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-286 0 SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-286 2 SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-286 3 SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-286 4 BSTPMALLOMD  073H TELNYX LLC 128   2017-05-03   
978-286 6 BRTNMACOVMD  7135 TC SYSTEMS, INC. 128   2018-10-05   
978-286 7 CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-07-10   
978-286 8 BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-10-21   
978-286 9 SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-05-05   
978-422 A STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 0 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 1 CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-14   
978-422 2 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 3 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 4 CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-01-13   
978-422 5 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 6 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 7 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 8 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 9 STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-563 A NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
978-563 1 NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
978-563 2   829J PAETEC ITEL, LLC 128   2010-07-22   
978-563 3 NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2013-05-29   
978-563 4 CATNMAAKPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2008-08-28   
978-563 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2012-03-22   
978-563 6 CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2007-02-01   
978-563 7 BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128   2014-04-25   
978-563 8 SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-05-05   
978-563 9 BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   
978-678 A   829J PAETEC ITEL, LLC 128      
978-678 0   829J PAETEC ITEL, LLC 128      
978-678 1 CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-14   
978-678 2 BSTPMALLOMD  073H TELNYX LLC 128   2021-03-04   
978-678 3 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
978-678 4 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
978-678 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
978-678 6 CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-05-15   
978-678 7 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-01-22   
978-678 8 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
978-678 9 CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-14   
978-843 A CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-843 0   145J TERRA NOVA TELECOM INC. 128   2022-08-02   
978-843 1   829J PAETEC ITEL, LLC 128   2005-12-23   
978-843 3 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-11-03   
978-843 4 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-04-11   
978-843 5 BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-06-06   
978-843 6   515J IP HORIZON LLC 128   2015-10-30   
978-843 7 CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-843 8 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-04-11   
978-843 9 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-07-23   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.