DNS Servers

United States of America 4331 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

  • 169.62.187.205

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    135ms
    |
    2ms
    |
    150ms
  • 169.62.187.206

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    132ms
    |
    2ms
    |
    154ms
  • 169.63.205.133

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    98% uptime

    137ms
    |
    1ms
    |
    80ms
  • 169.63.205.135

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    133ms
    |
    1ms
    |
    84ms
  • 169.63.205.136

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    134ms
    |
    1ms
    |
    88ms
  • 169.63.214.195

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    133ms
    |
    1ms
    |
    97ms
  • 169.63.214.202

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    135ms
    |
    0ms
    |
    95ms
  • 169.63.214.209

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    135ms
    |
    1ms
    |
    85ms
  • 169.63.214.210

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    135ms
    |
    1ms
    |
    82ms
  • 169.63.214.215

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    133ms
    |
    1ms
    |
    90ms
  • 169.63.214.216

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    136ms
    |
    1ms
    |
    90ms
  • 170.55.34.120

    Crown Castle Fiber LLC

    AS33132

    Dallas

    32.7831, -96.8067

    100% uptime

    140ms
    |
    27ms
    |
    187ms
  • 170.55.159.178

    Crown Castle Fiber LLC

    AS33132

    Dallas

    32.7831, -96.8067

    100% uptime

    142ms
    |
    4ms
    |
    208ms
  • 172.86.91.198

    RouterHosting LLC

    AS14956

    Dallas

    32.7831, -96.8067

    100% uptime

    131ms
    |
    4ms
    |
    176ms
  • 172.108.204.226

    Frontier Communications of America, Inc.

    AS5650

    Dallas

    32.7831, -96.8067

    98% uptime

    138ms
    |
    1ms
    |
    213ms
  • 172.245.60.71

    HostPapa

    AS36352

    Dallas

    32.7831, -96.8067

    98% uptime

    134ms
    |
    2ms
    |
    202ms
  • 173.0.129.254

    Apyl Inc

    AS53628

    Dallas

    32.7831, -96.8067

    96% uptime

    114ms
    |
    3ms
    |
    125ms
  • 173.0.139.254

    Apyl Inc

    AS53628

    Dallas

    32.7831, -96.8067

    96% uptime

    114ms
    |
    1ms
    |
    92ms
  • 173.175.200.230

    Charter Communications Inc

    AS11427

    Dallas

    32.7831, -96.8067

    100% uptime

    143ms
    |
    11ms
    |
    223ms
  • 174.143.201.51

    Rackspace Hosting

    AS33070

    Dallas

    32.7831, -96.8067

    98% uptime

    131ms
    |
    3ms
    |
    146ms
  • 184.105.10.69

    Hurricane Electric LLC

    AS6939

    Dallas

    32.7831, -96.8067

    100% uptime

    124ms
    |
    11ms
    |
    34ms
  • 192.3.107.241

    HostPapa

    AS36352

    Dallas

    32.7831, -96.8067

    100% uptime

    135ms
    |
    1ms
    |
    39ms
  • 192.198.247.210

    Charter Communications Inc

    AS11427

    Dallas

    32.7831, -96.8067

    100% uptime

    133ms
    |
    1ms
    |
    158ms
  • 192.227.248.157

    HostPapa

    AS36352

    Dallas

    32.7831, -96.8067

    100% uptime

    138ms
    |
    1ms
    |
    36ms
  • 192.255.3.222

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    134ms
    |
    1ms
    |
    155ms
  • 192.255.24.190

    IBM Cloud

    AS36351

    Dallas

    32.7831, -96.8067

    100% uptime

    133ms
    |
    1ms
    |
    160ms
  • 199.189.67.5

    Connectria

    AS11734

    Dallas

    32.7831, -96.8067

    100% uptime

    118ms
    |
    6ms
    |
    160ms
  • 207.106.1.2

    Windstream Communications LLC

    AS7029

    Dallas

    32.7831, -96.8067

    100% uptime

    91ms
    |
    3ms
    |
    101ms
  • 208.115.208.185

    Limestone Networks, Inc.

    AS46475

    Dallas

    32.7831, -96.8067

    98% uptime

    115ms
    |
    4ms
    |
    173ms
  • 209.120.136.146

    GTT Communications Inc.

    AS3257

    Dallas

    32.7831, -96.8067

    100% uptime

    116ms
    |
    2ms
    |
    136ms
  • 216.128.134.119

    The Constant Company, LLC

    AS20473

    Dallas

    32.7831, -96.8067

    98% uptime

    140ms
    |
    4ms
    |
    122ms
  • 216.128.135.4

    The Constant Company, LLC

    AS20473

    Dallas

    32.7831, -96.8067

    99% uptime

    143ms
    |
    4ms
    |
    94ms
  • 216.129.158.86

    Computer Design & Integration LLC

    AS63427

    Dallas

    32.7831, -96.8067

    100% uptime

    139ms
    |
    5ms
    |
    44ms
  • 216.129.158.87

    Computer Design & Integration LLC

    AS63427

    Dallas

    32.7831, -96.8067

    100% uptime

    139ms
    |
    5ms
    |
    39ms
  • 184.56.167.250

    Charter Communications Inc

    AS10796

    Danville

    37.6456, -84.7722

    96% uptime

    138ms
    |
    3ms
    |
    222ms
  • 74.90.46.57

    Cablevision Systems Corp.

    AS6128

    Darien

    41.0787, -73.4693

    100% uptime

    103ms
    |
    2ms
    |
    168ms
  • 12.118.173.226

    AT&T Enterprises, LLC

    AS7018

    Davie

    26.0629, -80.2331

    100% uptime

    136ms
    |
    3ms
    |
    280ms
  • 50.150.159.234

    Comcast Cable Communications, LLC

    AS7922

    Davie

    26.0629, -80.2331

    100% uptime

    136ms
    |
    12ms
    |
    175ms
  • 50.150.159.235

    Comcast Cable Communications, LLC

    AS7922

    Davie

    26.0629, -80.2331

    100% uptime

    126ms
    |
    9ms
    |
    186ms
  • 96.75.94.165

    Comcast Cable Communications, LLC

    AS7922

    Davie

    26.0629, -80.2331

    96% uptime

    142ms
    |
    6ms
    |
    258ms
  • 168.150.123.29

    University of California, Davis

    AS6192

    Davis

    38.5449, -121.7405

    100% uptime

    164ms
    |
    1ms
    |
    108ms
  • 98.23.213.80

    Windstream Communications LLC

    AS7029

    Dawsonville

    34.4212, -84.1191

    100% uptime

    126ms
    |
    4ms
    |
    205ms
  • 70.61.146.254

    Charter Communications Inc

    AS10796

    Dayton

    39.7589, -84.1916

    100% uptime

    124ms
    |
    2ms
    |
    229ms
  • 24.214.74.82

    WideOpenWest Finance LLC

    AS12083

    Dearborn

    42.3223, -83.1763

    100% uptime

    114ms
    |
    0ms
    |
    178ms
  • 65.140.102.114

    CenturyLink Communications, LLC

    AS209

    Decatur

    33.2343, -97.5861

    99% uptime

    135ms
    |
    2ms
    |
    44ms
  • 99.98.129.203

    AT&T Enterprises, LLC

    AS7018

    Decatur

    39.8403, -88.9548

    96% uptime

    122ms
    |
    1ms
    |
    104ms
  • 99.98.129.204

    AT&T Enterprises, LLC

    AS7018

    Decatur

    39.8403, -88.9548

    98% uptime

    122ms
    |
    2ms
    |
    92ms
  • 156.19.134.122

    Charter Communications LLC

    AS20115

    Decatur

    34.6059, -86.9833

    98% uptime

    134ms
    |
    10ms
    |
    70ms
  • 209.6.164.2

    RCN

    AS6079

    Dedham

    42.2418, -71.1662

    98% uptime

    115ms
    |
    2ms
    |
    172ms
  • 208.81.153.186

    WIRED OR WIRELESS INC.

    AS18913

    Deer Park

    47.9543, -117.4769

    96% uptime

    154ms
    |
    6ms
    |
    270ms
  • 24.115.70.162

    PenTeleData Inc.

    AS3737

    Delano

    40.8390, -76.0710

    100% uptime

    97ms
    |
    2ms
    |
    143ms
  • 50.29.222.140

    PenTeleData Inc.

    AS3737

    Delano

    40.8390, -76.0710

    96% uptime

    99ms
    |
    2ms
    |
    144ms
  • 104.167.230.19

    STiBaRC

    AS26533

    Delaware

    40.2987, -83.0680

    100% uptime

    106ms
    |
    2ms
    |
    47ms
  • 4.39.92.210

    Level 3 Parent, LLC

    AS3356

    Denver

    39.7392, -104.9847

    100% uptime

    141ms
    |
    3ms
    |
    75ms
  • 4.39.221.194

    Level 3 Parent, LLC

    AS3356

    Denver

    39.7392, -104.9847

    99% uptime

    141ms
    |
    10ms
    |
    171ms
  • 12.87.80.130

    AT&T Enterprises, LLC

    AS7018

    Denver

    39.7392, -104.9847

    100% uptime

    154ms
    |
    5ms
    |
    45ms
  • 23.161.32.57

    Vertical Computers

    AS12131

    Denver

    39.7392, -104.9847

    98% uptime

    119ms
    |
    1ms
    |
    42ms
  • 38.15.32.55

    City of Fort Collins

    AS397142

    Denver

    39.7392, -104.9847

    100% uptime

    125ms
    |
    1ms
    |
    145ms
  • 38.15.59.32

    City of Fort Collins

    AS397142

    Denver

    39.7392, -104.9847

    100% uptime

    123ms
    |
    1ms
    |
    141ms
  • 38.147.233.38

    City of Fort Collins

    AS397142

    Denver

    39.7392, -104.9847

    100% uptime

    124ms
    |
    1ms
    |
    143ms
  • 50.169.145.74

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    99% uptime

    143ms
    |
    10ms
    |
    251ms
  • 50.169.193.78

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    141ms
    |
    12ms
    |
    177ms
  • 50.169.200.242

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    154ms
    |
    4ms
    |
    284ms
  • 50.169.239.150

    Comcast Cable Communications, LLC

    AS33652

    Denver

    39.7392, -104.9847

    96% uptime

    143ms
    |
    2ms
    |
    550ms
  • 50.204.47.186

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    99% uptime

    143ms
    |
    10ms
    |
    150ms
  • 50.217.160.129

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    144ms
    |
    3ms
    |
    86ms
  • 50.228.62.242

    Comcast Cable Communications, LLC

    AS33652

    Denver

    39.7392, -104.9847

    100% uptime

    142ms
    |
    3ms
    |
    176ms
  • 50.232.168.146

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    140ms
    |
    8ms
    |
    165ms
  • 50.233.83.210

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    140ms
    |
    9ms
    |
    106ms
  • 63.238.229.161

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    98% uptime

    139ms
    |
    4ms
    |
    173ms
  • 63.238.229.165

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    96% uptime

    141ms
    |
    3ms
    |
    169ms
  • 64.27.52.130

    Handy Networks, LLC

    AS30475

    Denver

    39.7392, -104.9847

    100% uptime

    119ms
    |
    1ms
    |
    236ms
  • 64.111.22.116

    Data102

    AS33302

    Denver

    39.7392, -104.9847

    99% uptime

    134ms
    |
    12ms
    |
    166ms
  • 64.111.22.117

    Data102

    AS33302

    Denver

    39.7392, -104.9847

    99% uptime

    134ms
    |
    10ms
    |
    166ms
  • 64.156.38.134

    Level 3 Parent, LLC

    AS3356

    Denver

    39.7392, -104.9847

    98% uptime

    153ms
    |
    12ms
    |
    104ms
  • 66.35.44.162

    Iron Mountain Data Center

    AS12025

    Denver

    39.7392, -104.9847

    98% uptime

    133ms
    |
    4ms
    |
    162ms
  • 66.35.44.184

    Iron Mountain Data Center

    AS12025

    Denver

    39.7392, -104.9847

    100% uptime

    133ms
    |
    4ms
    |
    170ms
  • 66.110.185.130

    Otava, LLC

    AS26891

    Denver

    39.7392, -104.9847

    99% uptime

    131ms
    |
    13ms
    |
    159ms
  • 67.43.215.38

    VISTABEAM

    AS394883

    Denver

    39.7392, -104.9847

    100% uptime

    140ms
    |
    1ms
    |
    364ms
  • 71.218.133.15

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    96% uptime

    141ms
    |
    2ms
    |
    73ms
  • 73.153.147.127

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    99% uptime

    151ms
    |
    5ms
    |
    281ms
  • 73.229.33.146

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    100% uptime

    151ms
    |
    11ms
    |
    270ms
  • 73.229.147.241

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    99% uptime

    149ms
    |
    5ms
    |
    256ms
  • 75.71.255.82

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    99% uptime

    148ms
    |
    13ms
    |
    288ms
  • 76.25.92.41

    Comcast Cable Communications, LLC

    AS7922

    Denver

    39.7392, -104.9847

    98% uptime

    151ms
    |
    4ms
    |
    291ms
  • 143.105.182.38

    Space Exploration Technologies Corporation

    AS14593

    Denver

    39.7392, -104.9847

    100% uptime

    156ms
    |
    7ms
    |
    91ms
  • 192.199.241.66

    Handy Networks, LLC

    AS30475

    Denver

    39.7392, -104.9847

    99% uptime

    119ms
    |
    8ms
    |
    234ms
  • 204.133.216.98

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    98% uptime

    139ms
    |
    4ms
    |
    163ms
  • 204.133.216.99

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    96% uptime

    141ms
    |
    4ms
    |
    170ms
  • 204.133.216.103

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    96% uptime

    141ms
    |
    4ms
    |
    168ms
  • 204.133.216.105

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    98% uptime

    139ms
    |
    4ms
    |
    174ms
  • 204.133.216.106

    CenturyLink Communications, LLC

    AS209

    Denver

    39.7392, -104.9847

    96% uptime

    141ms
    |
    4ms
    |
    170ms
  • 208.85.60.6

    Clearfly Communications

    AS27400

    Denver

    39.7392, -104.9847

    100% uptime

    134ms
    |
    3ms
    |
    143ms
  • 216.239.233.179

    Latisys-Denver, LLC

    AS29863

    Denver

    39.7392, -104.9847

    100% uptime

    120ms
    |
    5ms
    |
    157ms
  • 71.232.253.80

    Comcast Cable Communications, LLC

    AS7922

    Derry Village

    42.8918, -71.3120

    99% uptime

    117ms
    |
    2ms
    |
    184ms
  • 20.118.25.179

    Microsoft Corporation

    AS8075

    Des Moines

    41.6005, -93.6091

    100% uptime

    126ms
    |
    3ms
    |
    98ms
  • 40.78.146.89

    Microsoft Corporation

    AS8075

    Des Moines

    41.6005, -93.6091

    100% uptime

    122ms
    |
    4ms
    |
    174ms
  • 52.228.225.52

    Microsoft Corporation

    AS8075

    Des Moines

    41.6005, -93.6091

    100% uptime

    124ms
    |
    3ms
    |
    27ms
  • 199.200.74.52

    Unite Private Networks LLC.

    AS15164

    Des Moines

    41.6005, -93.6091

    98% uptime

    121ms
    |
    2ms
    |
    110ms
  • 207.32.15.66

    Aureon Network Services

    AS5056

    Des Moines

    41.6005, -93.6091

    100% uptime

    113ms
    |
    2ms
    |
    76ms