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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-574 3 East Boston MA   7135 TC SYSTEMS, INC. 128   2009-08-13   
857-574 4 East Boston MA   892D ONVOY, LLC - MA 128   2010-04-07   
857-574 5 East Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-07-03   
857-574 6 East Boston MA   316E YMAX COMMUNICATIONS CORP. - MA 128   2011-01-24   
857-574 7 East Boston MA   7421 AT&T LOCAL 128   2001-06-28   
857-574 8 East Boston MA   3370 CTC COMMUNICATIONS CORP. - MA 128   2001-09-24   
857-574 9 East Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-06-03   
857-576 A Brookline MA   966G LOCAL ACCESS LLC - MA 128      
857-576 0 Brookline MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-576 1 Brookline MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2013-10-11   
857-576 2 Brookline MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-576 3 Brookline MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-576 4 Brookline MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-576 5 Brookline MA   892D ONVOY, LLC - MA 128   2014-09-14   
857-576 6 Brookline MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2014-09-29   
857-576 7 Brookline MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-10-06   
857-576 8 Brookline MA   892D ONVOY, LLC - MA 128   2019-02-23   
857-576 9 Brookline MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2013-10-11   
857-577 A Charlestown MA   892D ONVOY, LLC - MA 128      
857-577 0 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 1 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 2 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 3 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 4 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 5 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 6 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-577 7 Charlestown MA   892D ONVOY, LLC - MA 128   2016-04-11   
857-577 8 Charlestown MA   892D ONVOY, LLC - MA 128   2016-04-11   
857-577 9 Charlestown MA   756G WIDE VOICE, LLC - MA 128   2016-04-12   
857-587 A Dorchester MA   756G WIDE VOICE, LLC - MA 128      
857-587 0 Dorchester MA   892D ONVOY, LLC - MA 128   2016-03-22   
857-587 1 Dorchester MA   892D ONVOY, LLC - MA 128   2016-03-22   
857-587 2 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 3 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 4 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 5 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 6 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 7 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-03-21   
857-587 8 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-587 9 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2016-05-12   
857-588 A Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      
857-588 0 Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      
857-588 1 Charlestown MA   019F CBEYOND COMMUNICATIONS, LLC - MA 128   2010-03-15   
857-588 2 Charlestown MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2013-11-10   
857-588 3 Charlestown MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2013-11-10   
857-588 4 Charlestown MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2013-11-10   
857-588 5 Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      
857-588 6 Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      
857-588 7 Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      
857-588 8 Charlestown MA   4536 XO MASSACHUSETTS, INC. 128      

<< 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 >>

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.