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: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

<< 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 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-430 5 Herndon VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-02   
571-430 6 Herndon VA WASHDC125MD  197D VONAGE NETWORK INC. 236   2020-05-19   
571-430 7 Herndon VA OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2020-08-10   
571-430 8 Herndon VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-01-02   
571-430 9 Herndon VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2020-03-08   
571-431 A Washington Zone 8 VA ALXNVAAXDS0  9213 VERIZON VIRGINIA, INC. 236      
571-431 0 Washington Zone 8 VA ALXNVAAXDS0  9213 VERIZON VIRGINIA, INC. 236      
571-431 1 Washington Zone 8 VA WASHDCDP8MD  079F BANDWIDTH.COM CLEC, LLC - VA 236   2005-08-15   
571-431 2 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-05-02   
571-431 3 Washington Zone 8 VA ALXNVAAXDS0  9213 VERIZON VIRGINIA, INC. 236      
571-431 4 Washington Zone 8 VA ALXNVAAXDS0  9213 VERIZON VIRGINIA, INC. 236      
571-431 5 Washington Zone 8 VA ALXNVAAXDS0  9213 VERIZON VIRGINIA, INC. 236      
571-431 6 Washington Zone 8 VA ARTNVAARXDY  318J COMCAST IP PHONE LLC 236   2006-04-01   
571-431 7 Washington Zone 8 VA ARTNVAARXDY  318J COMCAST IP PHONE LLC 236   2006-04-01   
571-431 8 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2004-09-02   
571-431 9 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2004-09-02   
571-432 A Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 0 Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 1 Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 2 Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 3 Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 4 Washington Zone 19 VA FRFXVAFFDS0  9213 VERIZON VIRGINIA, INC. 236      
571-432 5 Washington Zone 19 VA   145J TERRA NOVA TELECOM INC. 236   2021-05-15   
571-432 6 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2004-02-02   
571-432 7 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-08-20   
571-432 8 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-08-20   
571-432 9 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-10-25   
571-433 A Washington Zone 8 VA ARTNVAARDS0  9213 VERIZON VIRGINIA, INC. 236      
571-434 A Herndon VA HRNDVASTDS0  9213 VERIZON VIRGINIA, INC. 236      
571-435 A Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
571-435 0 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-04-24   
571-435 1 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-04-24   
571-435 2 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 3 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 4 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 5 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 6 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 7 Washington Zone 19 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
571-435 8 Washington Zone 19 VA WASHDCMTX7X  2700 CTC COMMUNICATIONS CORP. - VA 236   2005-08-07   
571-435 9 Washington Zone 19 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2012-12-13   
571-436 A Herndon VA WASHDCSWXCZ  6664 SPRINT SPECTRUM L.P. 236      
571-437 A Herndon VA WASHDCSWXCZ  6664 SPRINT SPECTRUM L.P. 236      
571-438 A Washington Zone 8 VA HRNDVACKDS0  1960 ATX TELECOMMUNICATIONS SERVICES, LTD-VA 236      
571-438 0 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-12-08   
571-438 1 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-12-08   
571-438 2 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-03-07   
571-438 3 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2006-03-07   
571-438 4 Washington Zone 8 VA WASHDCSWXCZ  6664 SPRINT SPECTRUM L.P. 236   2004-12-25   
571-438 5 Washington Zone 8 VA BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-06-23   
571-438 6 Washington Zone 8 VA HRNDVACKDS0  1960 ATX TELECOMMUNICATIONS SERVICES, LTD-VA 236      

<< 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 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 >>

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.