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.

Cambridge, MA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
617-540 3 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-540 4 CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-07-06   
617-540 5 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
617-540 6 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-540 7 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-540 8 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-540 9 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-547 A CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-551 A CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-575 A CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 0 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 1 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 2 BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-03-24   
617-575 3 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 4 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 5 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 6 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 7   829J PAETEC ITEL, LLC 128   2008-07-30   
617-575 8 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 9 BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   
617-576 A CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-577 A CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-583 A   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-583 0 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 1   829J PAETEC ITEL, LLC 128      
617-583 2 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 3 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 4 CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-583 5   829J PAETEC ITEL, LLC 128      
617-583 6   829J PAETEC ITEL, LLC 128      
617-583 7   829J PAETEC ITEL, LLC 128   2008-12-18   
617-583 8   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-583 9   829J PAETEC ITEL, LLC 128   2008-12-18   
617-588 A   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
617-599 A CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-599 0 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2003-08-10   
617-599 1 CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-599 2 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2003-09-17   
617-599 3 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2004-09-07   
617-599 4 CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2008-11-02   
617-599 5 NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2008-06-28   
617-599 6 CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2008-11-02   
617-599 7 CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2008-12-18   
617-599 8 CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2003-08-10   
617-599 9 CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2008-09-15   
617-613 A CMBRMA01DS5  7135 TC SYSTEMS, INC. 128      
617-621 A CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-621 0 CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-621 1 CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-621 2 CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 >>

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.