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
857-346 7 Boston MA   5562 METRO PCS, INC. 128   2018-08-02   
857-346 8 Boston MA   5562 METRO PCS, INC. 128   2018-08-02   
857-346 9 Boston MA   5562 METRO PCS, INC. 128   2018-08-02   
857-347 A Boston MA   181J ADVANCED TELECOM SOLUTIONS, LLC 128   2018-08-27   
857-347 0 Boston MA   181J ADVANCED TELECOM SOLUTIONS, LLC 128   2018-08-27   
857-347 1 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2018-10-07   
857-347 2 Boston MA   551G BRIGHTLINK COMMUNICATIONS, LLC 128   2018-10-14   
857-347 3 Boston MA   892D ONVOY, LLC - MA 128   2018-08-28   
857-347 4 Boston MA   892D ONVOY, LLC - MA 128   2018-08-28   
857-347 5 Boston MA   892D ONVOY, LLC - MA 128   2018-08-28   
857-347 6 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-08-28   
857-347 7 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-08-28   
857-347 8 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-08-28   
857-347 9 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-08-28   
857-348 A Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-09-27   
857-348 0 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2018-10-07   
857-348 2 Boston MA   551G BRIGHTLINK COMMUNICATIONS, LLC 128   2018-10-14   
857-348 3 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2018-11-26   
857-348 4 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2018-11-26   
857-348 5 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2018-11-26   
857-348 6 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-09-27   
857-348 7 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-09-27   
857-348 8 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-09-27   
857-348 9 Boston MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-09-27   
857-349 A Winthrop MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2018-11-22   
857-349 0 Winthrop MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2018-11-22   
857-349 1 Winthrop MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2019-03-06   
857-349 6 Winthrop MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2019-05-10   
857-349 8 Winthrop MA   073H TELNYX LLC 128   2019-04-29   
857-349 9 Winthrop MA   892D ONVOY, LLC - MA 128   2020-07-07   
857-350 A Boston MA WRXBMAWACM2  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2007-08-09   
857-350 0 Boston MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2007-08-09   
857-350 1 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2007-09-07   
857-350 2 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-11-16   
857-350 3 Boston MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2007-10-01   
857-350 4 Boston MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2007-10-01   
857-350 5 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-11-16   
857-350 6 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-11-16   
857-350 7 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2007-11-16   
857-350 8 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2007-12-07   
857-350 9 Boston MA   4536 XO MASSACHUSETTS, INC. 128   2007-12-07   
857-352 A Brookline MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128      
857-352 0 Brookline MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2015-06-22   
857-352 1 Brookline MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-08-01   
857-352 2 Brookline MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2015-08-01   
857-352 3 Brookline MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2015-08-18   
857-352 4 Brookline MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2015-08-18   
857-352 5 Brookline MA   7199 MCI WORLDCOM COMMUNICATIONS, INC. - MA 128   2016-06-16   
857-352 6 Brookline MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2018-04-20   
857-352 7 Brookline MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2015-03-21   

<< 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: ISP Telecom

Like this site? We accept donations via PayPal.