DNS Servers

United States of America 4394 local DNS servers

For debugging only

This list is intended to help troubleshoot DNS issues. Do not configure these servers as your DNS resolver unless you know and trust the operator. A DNS resolver can log the domains you look up and can manipulate or block DNS responses.

Instead, use your ISP's default DNS server, or a global DNS server operated by an organisation you trust.

Global DNS servers

  • 73.115.207.92

    Comcast Cable Communications, LLC

    AS7922

    Houston

    29.7633, -95.3633

    100% uptime

    151ms
    |
    2ms
    |
    310ms
  • 73.183.188.156

    Comcast Cable Communications, LLC

    AS7922

    Houston

    29.7633, -95.3633

    99% uptime

    149ms
    |
    2ms
    |
    108ms
  • 75.148.198.225

    Comcast Cable Communications, LLC

    AS7922

    Houston

    29.7633, -95.3633

    100% uptime

    150ms
    |
    3ms
    |
    178ms
  • 96.79.183.13

    Comcast Cable Communications, LLC

    AS7922

    Houston

    29.7633, -95.3633

    99% uptime

    138ms
    |
    9ms
    |
    173ms
  • 98.196.240.110

    Comcast Cable Communications, LLC

    AS7922

    Houston

    29.7633, -95.3633

    98% uptime

    146ms
    |
    3ms
    |
    106ms
  • 99.76.21.11

    AT&T Enterprises, LLC

    AS7018

    Houston

    29.7633, -95.3633

    100% uptime

    137ms
    |
    1ms
    |
    178ms
  • 139.138.132.139

    Logix

    AS25956

    Houston

    29.7633, -95.3633

    98% uptime

    135ms
    |
    1ms
    |
    73ms
  • 168.4.130.142

    Rice University

    AS8

    Houston

    29.7633, -95.3633

    100% uptime

    138ms
    |
    1ms
    |
    230ms
  • 168.4.147.18

    Rice University

    AS8

    Houston

    29.7633, -95.3633

    100% uptime

    138ms
    |
    2ms
    |
    224ms
  • 168.4.160.95

    Rice University

    AS8

    Houston

    29.7633, -95.3633

    100% uptime

    139ms
    |
    1ms
    |
    231ms
  • 168.4.179.103

    Rice University

    AS8

    Houston

    29.7633, -95.3633

    100% uptime

    138ms
    |
    1ms
    |
    224ms
  • 209.135.168.197

    Snaju Development

    AS399646

    Houston

    29.7633, -95.3633

    94% uptime

    141ms
    |
    0ms
    |
    161ms
  • 216.117.49.28

    DataBank Holdings, Ltd.

    AS13767

    Houston

    29.7696, -95.5201

    100% uptime

    134ms
    |
    1ms
    |
    185ms
  • 216.230.233.99

    The Optimal Link Corporation

    AS40156

    Houston

    29.7633, -95.3633

    100% uptime

    126ms
    |
    2ms
    |
    89ms
  • 216.230.233.100

    The Optimal Link Corporation

    AS40156

    Houston

    29.7633, -95.3633

    99% uptime

    126ms
    |
    8ms
    |
    96ms
  • 216.230.233.101

    The Optimal Link Corporation

    AS40156

    Houston

    29.7633, -95.3633

    100% uptime

    126ms
    |
    1ms
    |
    85ms
  • 216.230.233.155

    The Optimal Link Corporation

    AS40156

    Houston

    29.7633, -95.3633

    100% uptime

    126ms
    |
    0ms
    |
    17ms
  • 174.53.144.146

    Comcast Cable Communications, LLC

    AS7922

    Hudson

    44.9747, -92.7569

    98% uptime

    129ms
    |
    6ms
    |
    235ms
  • 142.54.72.82

    Cablevision Systems Corp.

    AS6128

    Huntington

    40.8681, -73.4257

    100% uptime

    101ms
    |
    1ms
    |
    90ms
  • 47.178.9.35

    Frontier Communications of America, Inc.

    AS5650

    Huntington Beach

    33.6603, -117.9992

    99% uptime

    167ms
    |
    2ms
    |
    120ms
  • 12.94.237.126

    AT&T Enterprises, LLC

    AS7018

    Huntsville

    34.7304, -86.5859

    100% uptime

    132ms
    |
    12ms
    |
    193ms
  • 98.54.60.129

    Comcast Cable Communications, LLC

    AS7922

    Huntsville

    34.7304, -86.5859

    100% uptime

    133ms
    |
    1ms
    |
    218ms
  • 143.59.229.87

    WideOpenWest Finance LLC

    AS12083

    Huntsville

    34.7304, -86.5859

    99% uptime

    129ms
    |
    2ms
    |
    198ms
  • 167.142.165.247

    Aureon Network Services

    AS5056

    Huxley

    41.8953, -93.6008

    100% uptime

    111ms
    |
    0ms
    |
    246ms
  • 24.116.193.221

    CABLE ONE, INC.

    AS11492

    Idaho Falls

    43.4666, -112.0341

    99% uptime

    196ms
    |
    4ms
    |
    96ms
  • 24.117.169.168

    CABLE ONE, INC.

    AS11492

    Idaho Falls

    43.4666, -112.0341

    100% uptime

    199ms
    |
    4ms
    |
    110ms
  • 199.19.117.28

    Silver Star Communications

    AS26223

    Idaho Falls

    43.4666, -112.0341

    100% uptime

    139ms
    |
    2ms
    |
    49ms
  • 12.40.39.2

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    94% uptime

    147ms
    |
    1ms
    |
    28ms
  • 12.40.39.5

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    100% uptime

    149ms
    |
    0ms
    |
    26ms
  • 12.40.39.8

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    100% uptime

    149ms
    |
    1ms
    |
    26ms
  • 12.40.39.11

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    100% uptime

    148ms
    |
    2ms
    |
    90ms
  • 12.40.39.13

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    100% uptime

    148ms
    |
    0ms
    |
    60ms
  • 12.40.39.14

    AT&T Enterprises, LLC

    AS7018

    Independence

    39.0911, -94.4155

    99% uptime

    146ms
    |
    2ms
    |
    29ms
  • 67.53.20.72

    Charter Communications Inc

    AS10796

    Independence

    41.3687, -81.6379

    100% uptime

    109ms
    |
    0ms
    |
    114ms
  • 173.10.8.19

    Comcast Cable Communications, LLC

    AS7922

    Independence

    39.0911, -94.4155

    98% uptime

    131ms
    |
    2ms
    |
    196ms
  • 209.153.110.20

    KC Web, Inc.

    AS13654

    Independence

    39.0911, -94.4155

    94% uptime

    110ms
    |
    0ms
    |
    170ms
  • 209.153.110.42

    KC Web, Inc.

    AS13654

    Independence

    39.0911, -94.4155

    94% uptime

    110ms
    |
    0ms
    |
    169ms
  • 209.153.110.44

    KC Web, Inc.

    AS13654

    Independence

    39.0911, -94.4155

    89% uptime

    110ms
    |
    1ms
    |
    170ms
  • 209.153.110.48

    KC Web, Inc.

    AS13654

    Independence

    39.0911, -94.4155

    94% uptime

    110ms
    |
    0ms
    |
    171ms
  • 209.153.110.49

    KC Web, Inc.

    AS13654

    Independence

    39.0911, -94.4155

    100% uptime

    110ms
    |
    1ms
    |
    176ms
  • 38.86.82.101

    Smithville Digital, LLC

    AS11550

    Indianapolis

    39.7684, -86.1580

    100% uptime

    117ms
    |
    1ms
    |
    163ms
  • 50.150.251.116

    Comcast Cable Communications, LLC

    AS7922

    Indianapolis

    39.7684, -86.1580

    100% uptime

    130ms
    |
    0ms
    |
    182ms
  • 50.223.229.49

    Comcast Cable Communications, LLC

    AS7922

    Indianapolis

    39.7684, -86.1580

    98% uptime

    130ms
    |
    1ms
    |
    206ms
  • 50.238.174.106

    Comcast Cable Communications, LLC

    AS7922

    Indianapolis

    39.7684, -86.1580

    100% uptime

    131ms
    |
    1ms
    |
    31ms
  • 104.10.240.13

    AT&T Enterprises, LLC

    AS7018

    Indianapolis

    39.7684, -86.1580

    94% uptime

    115ms
    |
    3ms
    |
    20ms
  • 209.209.44.4

    J2 Technology LLC

    AS399332

    Indianapolis

    39.7684, -86.1580

    100% uptime

    105ms
    |
    1ms
    |
    117ms
  • 173.216.152.12

    Optimum

    AS19108

    Indian Point

    36.6284, -93.3438

    99% uptime

    143ms
    |
    2ms
    |
    215ms
  • 209.253.211.154

    Windstream Communications LLC

    AS7029

    Indian Trail

    35.0768, -80.6692

    100% uptime

    122ms
    |
    3ms
    |
    34ms
  • 47.179.58.82

    Frontier Communications of America, Inc.

    AS5650

    Industry

    34.0197, -117.9587

    99% uptime

    165ms
    |
    2ms
    |
    26ms
  • 12.38.212.195

    AT&T Enterprises, LLC

    AS7018

    Irvine

    33.6695, -117.8231

    100% uptime

    173ms
    |
    3ms
    |
    130ms
  • 38.102.244.213

    Cogent Communications, LLC

    AS174

    Irvine

    33.6695, -117.8231

    100% uptime

    172ms
    |
    2ms
    |
    90ms
  • 99.47.5.65

    AT&T Enterprises, LLC

    AS7018

    Irvine

    33.6695, -117.8231

    100% uptime

    158ms
    |
    63ms
    |
    66ms
  • 99.73.26.129

    AT&T Enterprises, LLC

    AS7018

    Irvine

    33.6695, -117.8231

    100% uptime

    166ms
    |
    3ms
    |
    23ms
  • 104.11.216.29

    AT&T Enterprises, LLC

    AS7018

    Irvine

    33.6695, -117.8231

    88% uptime

    166ms
    |
    2ms
    |
    197ms
  • 108.199.31.233

    AT&T Enterprises, LLC

    AS7018

    Irvine

    33.6695, -117.8231

    100% uptime

    170ms
    |
    2ms
    |
    144ms
  • 47.190.106.84

    Frontier Communications of America, Inc.

    AS5650

    Irving

    32.8140, -96.9489

    100% uptime

    134ms
    |
    1ms
    |
    14ms
  • 63.96.245.224

    Verizon Business

    AS701

    Irving

    32.8140, -96.9489

    100% uptime

    139ms
    |
    1ms
    |
    158ms
  • 97.99.1.72

    Charter Communications Inc

    AS11427

    Irving

    32.8140, -96.9489

    100% uptime

    134ms
    |
    1ms
    |
    170ms
  • 74.69.49.220

    Charter Communications Inc

    AS11351

    Ithaca

    42.4406, -76.4966

    99% uptime

    113ms
    |
    3ms
    |
    171ms
  • 173.45.187.91

    Haefele Connect

    AS26269

    Ithaca

    42.4406, -76.4966

    100% uptime

    112ms
    |
    10ms
    |
    133ms
  • 192.55.226.18

    Pound Bang Incorporated

    AS23086

    Ithaca

    42.4406, -76.4966

    100% uptime

    110ms
    |
    2ms
    |
    189ms
  • 69.167.211.195

    JACKSON ENERGY AUTHORITY

    AS53435

    Jackson

    35.6145, -88.8140

    99% uptime

    125ms
    |
    3ms
    |
    50ms
  • 173.235.18.102

    C Spire Fiber

    AS11272

    Jackson

    32.2988, -90.1848

    99% uptime

    113ms
    |
    2ms
    |
    104ms
  • 12.148.168.72

    AT&T Enterprises, LLC

    AS7018

    Jacksonville

    30.3322, -81.6556

    100% uptime

    134ms
    |
    2ms
    |
    100ms
  • 40.142.8.77

    TierPoint, LLC

    AS17378

    Jacksonville

    30.3322, -81.6556

    100% uptime

    107ms
    |
    1ms
    |
    174ms
  • 40.143.76.16

    TierPoint, LLC

    AS17378

    Jacksonville

    30.3322, -81.6556

    100% uptime

    145ms
    |
    1ms
    |
    91ms
  • 45.27.146.113

    AT&T Enterprises, LLC

    AS7018

    Jacksonville

    30.3322, -81.6556

    94% uptime

    144ms
    |
    4ms
    |
    59ms
  • 66.177.131.248

    Comcast Cable Communications, LLC

    AS7922

    Jacksonville

    30.3322, -81.6556

    99% uptime

    139ms
    |
    5ms
    |
    272ms
  • 73.192.17.11

    Comcast Cable Communications, LLC

    AS7922

    Jacksonville

    30.3322, -81.6556

    89% uptime

    142ms
    |
    1ms
    |
    256ms
  • 75.11.60.99

    AT&T Enterprises, LLC

    AS7018

    Jacksonville

    30.3322, -81.6556

    99% uptime

    137ms
    |
    5ms
    |
    171ms
  • 75.11.60.100

    AT&T Enterprises, LLC

    AS7018

    Jacksonville

    30.3322, -81.6556

    100% uptime

    137ms
    |
    22ms
    |
    174ms
  • 75.11.60.102

    AT&T Enterprises, LLC

    AS7018

    Jacksonville

    30.3322, -81.6556

    100% uptime

    145ms
    |
    0ms
    |
    160ms
  • 142.190.123.222

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    122ms
    |
    7ms
    |
    109ms
  • 170.249.156.195

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    99% uptime

    123ms
    |
    2ms
    |
    117ms
  • 170.249.156.197

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    123ms
    |
    6ms
    |
    120ms
  • 170.249.156.198

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    125ms
    |
    2ms
    |
    116ms
  • 170.249.156.199

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    99% uptime

    125ms
    |
    2ms
    |
    106ms
  • 170.249.156.200

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    123ms
    |
    5ms
    |
    118ms
  • 170.249.156.201

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    99% uptime

    125ms
    |
    2ms
    |
    121ms
  • 170.249.156.203

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    125ms
    |
    3ms
    |
    122ms
  • 170.249.156.204

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    125ms
    |
    0ms
    |
    120ms
  • 170.249.156.205

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    125ms
    |
    2ms
    |
    126ms
  • 170.249.156.206

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    125ms
    |
    2ms
    |
    107ms
  • 170.249.156.207

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    100% uptime

    123ms
    |
    2ms
    |
    124ms
  • 170.249.156.208

    Uniti Fiber Holdings Inc.

    AS13760

    Jacksonville

    30.3322, -81.6556

    99% uptime

    123ms
    |
    2ms
    |
    119ms
  • 162.17.232.97

    Comcast Cable Communications, LLC

    AS7922

    Jamesburg

    40.3526, -74.4402

    100% uptime

    113ms
    |
    1ms
    |
    126ms
  • 199.33.102.177

    Twin Lakes Telephone Cooperative Corporation

    AS19331

    Jamestown

    36.4276, -84.9319

    100% uptime

    109ms
    |
    0ms
    |
    198ms
  • 12.162.127.75

    AT&T Enterprises, LLC

    AS7018

    Jasper

    30.9202, -93.9966

    100% uptime

    146ms
    |
    5ms
    |
    57ms
  • 66.44.219.187

    Ellijay Telephone Company

    AS25853

    Jasper

    34.4679, -84.4291

    100% uptime

    108ms
    |
    1ms
    |
    132ms
  • 173.243.183.230

    Smithville Digital, LLC

    AS11550

    Jasper

    38.3914, -86.9311

    99% uptime

    123ms
    |
    1ms
    |
    32ms
  • 98.22.76.147

    Windstream Communications LLC

    AS7029

    Jefferson

    34.1170, -83.5724

    98% uptime

    123ms
    |
    4ms
    |
    201ms
  • 24.105.222.213

    Mid-Hudson Cablevision, Inc.

    AS32953

    Jefferson Heights

    42.2340, -73.8824

    100% uptime

    94ms
    |
    6ms
    |
    169ms
  • 24.105.225.140

    Mid-Hudson Cablevision, Inc.

    AS32953

    Jefferson Heights

    42.2340, -73.8824

    100% uptime

    95ms
    |
    1ms
    |
    169ms
  • 24.105.248.244

    Mid-Hudson Cablevision, Inc.

    AS32953

    Jefferson Heights

    42.2340, -73.8824

    100% uptime

    97ms
    |
    1ms
    |
    174ms
  • 24.148.113.63

    Mid-Hudson Cablevision, Inc.

    AS32953

    Jefferson Heights

    42.2340, -73.8824

    100% uptime

    97ms
    |
    5ms
    |
    188ms
  • 96.234.26.4

    Verizon Business

    AS701

    Jersey City

    40.7282, -74.0776

    100% uptime

    101ms
    |
    1ms
    |
    36ms
  • 108.5.108.226

    Verizon Business

    AS701

    Jersey City

    40.7282, -74.0776

    99% uptime

    97ms
    |
    1ms
    |
    131ms
  • 70.166.143.75

    Cox Communications Inc.

    AS22773

    Johnson

    36.1329, -94.1655

    99% uptime

    141ms
    |
    2ms
    |
    276ms
  • 70.182.162.98

    Cox Communications Inc.

    AS22773

    Johnson

    36.1329, -94.1655

    100% uptime

    140ms
    |
    5ms
    |
    274ms
  • 70.182.169.209

    Cox Communications Inc.

    AS22773

    Johnson

    36.1329, -94.1655

    99% uptime

    140ms
    |
    2ms
    |
    260ms