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: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-767 9 Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-11-03   
857-770 A Boston MA CMBRMABEEMD  116E INTRADO COMMUNICATIONS, LLC 128      
857-770 0 Boston MA CMBRMABEEMD  116E INTRADO COMMUNICATIONS, LLC 128   2015-02-21   
857-770 1 Boston MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-05-15   
857-770 2 Boston MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2015-05-16   
857-770 3 Boston MA WSBOMAGO0MD  4084 PAETEC COMMUNICATIONS, INC. - MA 128   2015-06-18   
857-770 4 Boston MA WSBOMAGO0MD  4084 PAETEC COMMUNICATIONS, INC. - MA 128   2015-06-18   
857-770 5 Boston MA WSBOMAGO0MD  4084 PAETEC COMMUNICATIONS, INC. - MA 128   2015-06-18   
857-770 6 Boston MA WSBOMAGO0MD  4084 PAETEC COMMUNICATIONS, INC. - MA 128   2015-06-18   
857-770 7 Boston MA WSBOMAGO0MD  4084 PAETEC COMMUNICATIONS, INC. - MA 128   2015-06-18   
857-770 8 Boston MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2015-07-23   
857-770 9 Boston MA CMBRMABEEMD  116E INTRADO COMMUNICATIONS, LLC 128   2015-02-21   
857-772 A Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128      
857-772 0 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 1 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 2 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 3 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 4 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 5 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 6 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-09-24   
857-772 7 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2016-09-25   
857-772 8 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-10-17   
857-772 9 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2016-10-17   
857-773 A Jamaica Plain MA NRTNMAAACM4  5562 METROPCS, INC. 128      
857-773 0 Jamaica Plain MA BSTPMALLOMD  073H TELNYX LLC 128   2017-04-24   
857-773 1 Jamaica Plain MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2017-05-10   
857-773 2 Jamaica Plain MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2018-04-19   
857-773 3 Jamaica Plain MA NRTNMAAACM4  5562 METROPCS, INC. 128   2017-09-06   
857-773 4 Jamaica Plain MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2023-07-08   
857-773 5 Jamaica Plain MA CHTWMABF2MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128   2017-04-14   
857-773 6 Jamaica Plain MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2019-05-31   
857-773 7 Jamaica Plain MA NRTNMAAACM4  5562 METROPCS, INC. 128   2017-05-19   
857-773 8 Jamaica Plain MA   515J IP HORIZON LLC 128   2017-07-06   
857-773 9 Jamaica Plain MA NRTNMAAACM4  5562 METROPCS, INC. 128   2016-10-27   
857-776 A Chelsea MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
857-776 0 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-02-29   
857-776 1 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
857-776 2 Chelsea MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-776 3 Chelsea MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-04   
857-776 4 Chelsea MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-776 5 Chelsea MA BSTPMALLZMD  506J TWILIO INTERNATIONAL, INC. 128   2020-12-19   
857-776 6 Chelsea MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2014-06-18   
857-776 7 Chelsea MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-03-25   
857-776 8 Chelsea MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-776 9 Chelsea MA   515J IP HORIZON LLC 128      
857-777 A Cambridge MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
857-777 0 Cambridge MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-01-27   
857-777 1 Cambridge MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-01-27   
857-777 2 Cambridge MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-01-27   
857-777 3 Cambridge MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-01-27   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.