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
857-306 7 Boston MA   7575 CENTURYLINK COMMUNICATIONS LLC 128   2017-12-08   
857-306 8 Boston MA   7575 CENTURYLINK COMMUNICATIONS LLC 128   2017-12-08   
857-306 9 Boston MA   7575 CENTURYLINK COMMUNICATIONS LLC 128   2017-12-08   
857-307 A Brookline MA BKLIMAMADS1  9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 0 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 1 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 2 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 3 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 4 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 5 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 6 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 7 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 8 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-307 9 Brookline MA   9102 VERIZON NEW ENGLAND INC. 128   2006-04-03   
857-308 A Roxbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128      
857-308 0 Roxbury MA   892D ONVOY, LLC - MA 128   2015-08-24   
857-308 1 Roxbury MA   892D ONVOY, LLC - MA 128   2015-08-24   
857-308 2 Roxbury MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-05-17   
857-308 3 Roxbury MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2014-11-17   
857-308 4 Roxbury MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-05-17   
857-308 5 Roxbury MA   756G WIDE VOICE, LLC - MA 128   2015-06-19   
857-308 6 Roxbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-14   
857-308 7 Roxbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-14   
857-308 8 Roxbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-14   
857-308 9 Roxbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-14   
857-309 A Dorchester MA   892D ONVOY, LLC - MA 128      
857-309 0 Dorchester MA   892D ONVOY, LLC - MA 128   2015-02-13   
857-309 1 Dorchester MA   892D ONVOY, LLC - MA 128   2015-02-13   
857-309 2 Dorchester MA   892D ONVOY, LLC - MA 128   2015-02-13   
857-309 3 Dorchester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-02-23   
857-309 4 Dorchester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-02-23   
857-309 5 Dorchester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-02-23   
857-309 6 Dorchester MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2015-09-18   
857-309 7 Dorchester MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2015-09-29   
857-309 8 Dorchester MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2015-09-18   
857-309 9 Dorchester MA   756G WIDE VOICE, LLC - MA 128   2015-06-19   
857-310 A Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128      
857-310 0 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-02-01   
857-310 1 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-02-01   
857-310 2 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-02-01   
857-310 3 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-02-01   
857-310 4 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-03-01   
857-310 5 Boston MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2015-01-12   
857-310 6 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-03-15   
857-310 7 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-03-15   
857-310 8 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-12-13   
857-310 9 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-12-13   
857-312 A Boston MA CHFRMADCCM1  5562 METRO PCS, INC. 128   2008-12-01   
857-312 0 Boston MA   5562 METRO PCS, INC. 128   2008-12-01   
857-312 1 Boston MA   5562 METRO PCS, INC. 128   2008-12-01   

<< 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: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.