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

  • 198.199.94.146

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    1ms
    |
    84ms
  • 198.199.95.243

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    2ms
    |
    94ms
  • 198.199.96.52

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    93ms
  • 198.199.97.13

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    153ms
    |
    2ms
    |
    78ms
  • 198.199.97.247

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    150ms
    |
    1ms
    |
    82ms
  • 198.199.102.118

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    1ms
    |
    80ms
  • 198.199.103.88

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    2ms
    |
    88ms
  • 198.199.103.207

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    94ms
  • 198.199.103.243

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    82ms
  • 198.199.105.92

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    1ms
    |
    82ms
  • 198.199.107.125

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    1ms
    |
    84ms
  • 198.199.110.15

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    2ms
    |
    84ms
  • 198.199.112.88

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    1ms
    |
    84ms
  • 198.199.114.64

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    82ms
  • 198.199.116.133

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    2ms
    |
    80ms
  • 198.199.118.170

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    94ms
  • 208.69.40.127

    Another Corporate ISP, LLC

    AS32329

    San Francisco

    37.7749, -122.4194

    100% uptime

    142ms
    |
    8ms
    |
    184ms
  • 12.156.64.2

    AT&T Enterprises, LLC

    AS7018

    San Jose

    37.3394, -121.8950

    98% uptime

    164ms
    |
    3ms
    |
    79ms
  • 13.64.117.187

    Microsoft Corporation

    AS8075

    San Jose

    37.3394, -121.8950

    100% uptime

    156ms
    |
    5ms
    |
    20ms
  • 23.168.184.1

    Kasumi Networks NA LLC

    AS30307

    San Jose

    37.3394, -121.8950

    98% uptime

    159ms
    |
    4ms
    |
    161ms
  • 23.247.136.254

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    100% uptime

    141ms
    |
    1ms
    |
    20ms
  • 23.247.137.187

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    2ms
    |
    18ms
  • 23.247.137.190

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    99% uptime

    141ms
    |
    4ms
    |
    97ms
  • 23.247.137.192

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    2ms
    |
    93ms
  • 24.4.245.206

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    98% uptime

    177ms
    |
    2ms
    |
    309ms
  • 38.213.13.237

    OCTOPUS WEB SOLUTION INC

    AS984

    San Jose

    37.3394, -121.8950

    100% uptime

    158ms
    |
    23ms
    |
    20ms
  • 40.133.232.15

    Windstream Communications LLC

    AS7029

    San Jose

    37.3394, -121.8950

    100% uptime

    149ms
    |
    3ms
    |
    160ms
  • 44.190.40.1

    AZSIGNSHOP LLC

    AS6556

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    4ms
    |
    163ms
  • 45.9.9.2

    Kirino LLC

    AS41378

    San Jose

    37.3394, -121.8950

    99% uptime

    159ms
    |
    3ms
    |
    169ms
  • 50.175.182.34

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    165ms
    |
    1ms
    |
    150ms
  • 50.236.14.30

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    166ms
    |
    3ms
    |
    224ms
  • 50.239.2.142

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    98% uptime

    162ms
    |
    1ms
    |
    236ms
  • 52.119.110.242

    SYNERGY BROADBAND

    AS22768

    San Jose

    37.3394, -121.8950

    96% uptime

    142ms
    |
    4ms
    |
    356ms
  • 64.13.170.93

    Wave Broadband

    AS11404

    San Jose

    37.3394, -121.8950

    100% uptime

    160ms
    |
    5ms
    |
    11ms
  • 64.13.170.94

    Wave Broadband

    AS11404

    San Jose

    37.3394, -121.8950

    99% uptime

    161ms
    |
    3ms
    |
    9ms
  • 64.62.182.253

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    100% uptime

    149ms
    |
    8ms
    |
    70ms
  • 64.62.200.19

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    99% uptime

    149ms
    |
    7ms
    |
    91ms
  • 65.19.174.205

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    98% uptime

    149ms
    |
    12ms
    |
    208ms
  • 66.206.166.2

    Corporate West Computer Systems, Inc.

    AS13917

    San Jose

    37.3394, -121.8950

    98% uptime

    152ms
    |
    1ms
    |
    170ms
  • 66.220.29.6

    ServerOptima

    AS401742

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    5ms
    |
    92ms
  • 66.248.232.1

    AZSIGNSHOP LLC

    AS6556

    San Jose

    37.3394, -121.8950

    96% uptime

    141ms
    |
    8ms
    |
    176ms
  • 67.180.2.245

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    99% uptime

    177ms
    |
    2ms
    |
    286ms
  • 71.74.166.138

    Charter Communications Inc

    AS7843

    San Jose

    37.3394, -121.8950

    99% uptime

    160ms
    |
    1ms
    |
    150ms
  • 73.70.137.12

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    98% uptime

    175ms
    |
    2ms
    |
    302ms
  • 73.71.49.5

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    177ms
    |
    2ms
    |
    322ms
  • 73.223.236.131

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    96% uptime

    179ms
    |
    1ms
    |
    312ms
  • 75.144.243.65

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    177ms
    |
    3ms
    |
    232ms
  • 76.102.144.159

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    99% uptime

    175ms
    |
    2ms
    |
    315ms
  • 76.133.2.99

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    96% uptime

    172ms
    |
    1ms
    |
    322ms
  • 79.127.255.78

    Datacamp Limited

    AS60068

    San Jose

    37.3394, -121.8950

    100% uptime

    167ms
    |
    5ms
    |
    151ms
  • 95.111.214.150

    UpCloud USA Inc

    AS25697

    San Jose

    37.3394, -121.8950

    98% uptime

    161ms
    |
    2ms
    |
    179ms
  • 98.124.168.179

    GTT Communications Inc.

    AS3257

    San Jose

    37.3394, -121.8950

    100% uptime

    142ms
    |
    2ms
    |
    58ms
  • 103.175.99.7

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    5ms
    |
    18ms
  • 104.193.254.92

    Hosting Solution Ltd.

    AS14576

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    8ms
    |
    87ms
  • 104.202.75.178

    Wave Broadband

    AS11404

    San Jose

    37.3394, -121.8950

    98% uptime

    160ms
    |
    4ms
    |
    98ms
  • 107.1.152.69

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    162ms
    |
    1ms
    |
    262ms
  • 146.235.235.117

    Oracle Corporation

    AS31898

    San Jose

    37.3394, -121.8950

    98% uptime

    161ms
    |
    4ms
    |
    59ms
  • 162.223.74.84

    TPx Communications

    AS14265

    San Jose

    37.3394, -121.8950

    99% uptime

    171ms
    |
    1ms
    |
    230ms
  • 169.44.148.180

    IBM Cloud

    AS36351

    San Jose

    37.3394, -121.8950

    100% uptime

    159ms
    |
    2ms
    |
    184ms
  • 169.44.148.181

    IBM Cloud

    AS36351

    San Jose

    37.3394, -121.8950

    100% uptime

    158ms
    |
    2ms
    |
    188ms
  • 169.44.148.182

    IBM Cloud

    AS36351

    San Jose

    37.3394, -121.8950

    100% uptime

    161ms
    |
    2ms
    |
    182ms
  • 169.44.148.183

    IBM Cloud

    AS36351

    San Jose

    37.3394, -121.8950

    100% uptime

    156ms
    |
    2ms
    |
    184ms
  • 170.9.62.42

    Oracle Corporation

    AS31898

    San Jose

    37.3394, -121.8950

    100% uptime

    155ms
    |
    3ms
    |
    129ms
  • 173.205.197.11

    Equinix, Inc.

    AS54588

    San Jose

    37.3394, -121.8950

    98% uptime

    162ms
    |
    3ms
    |
    178ms
  • 184.23.62.99

    Sonic Telecom LLC

    AS46375

    San Jose

    37.3394, -121.8950

    98% uptime

    160ms
    |
    4ms
    |
    190ms
  • 184.75.247.68

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    99% uptime

    149ms
    |
    7ms
    |
    204ms
  • 184.75.247.70

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    98% uptime

    149ms
    |
    7ms
    |
    202ms
  • 184.75.247.163

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    98% uptime

    149ms
    |
    8ms
    |
    202ms
  • 185.23.182.41

    Kaopu Cloud HK Limited

    AS138915

    San Jose

    37.3394, -121.8950

    100% uptime

    145ms
    |
    2ms
    |
    93ms
  • 185.148.14.222

    Kirino LLC

    AS41378

    San Jose

    37.3394, -121.8950

    100% uptime

    162ms
    |
    4ms
    |
    1ms
  • 185.149.69.74

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    100% uptime

    149ms
    |
    9ms
    |
    170ms
  • 185.149.70.74

    Hurricane Electric LLC

    AS6939

    San Jose

    37.3394, -121.8950

    98% uptime

    149ms
    |
    8ms
    |
    172ms
  • 192.9.137.222

    Oracle Corporation

    AS31898

    San Jose

    37.3394, -121.8950

    100% uptime

    161ms
    |
    3ms
    |
    96ms
  • 192.9.143.48

    Oracle Corporation

    AS31898

    San Jose

    37.3394, -121.8950

    96% uptime

    161ms
    |
    11ms
    |
    179ms
  • 192.9.227.52

    Oracle Corporation

    AS31898

    San Jose

    37.3394, -121.8950

    100% uptime

    159ms
    |
    3ms
    |
    22ms
  • 192.227.167.147

    HostPapa

    AS36352

    San Jose

    37.3394, -121.8950

    99% uptime

    161ms
    |
    1ms
    |
    146ms
  • 192.227.167.171

    HostPapa

    AS36352

    San Jose

    37.3394, -121.8950

    99% uptime

    159ms
    |
    1ms
    |
    22ms
  • 198.8.62.5

    HostRocket.com, Inc.

    AS62756

    San Jose

    37.3394, -121.8950

    96% uptime

    141ms
    |
    6ms
    |
    82ms
  • 198.8.63.7

    HostRocket.com, Inc.

    AS62756

    San Jose

    37.3394, -121.8950

    99% uptime

    141ms
    |
    5ms
    |
    97ms
  • 199.16.104.4

    Half Bat LLC

    AS23403

    San Jose

    37.3394, -121.8950

    99% uptime

    159ms
    |
    2ms
    |
    31ms
  • 207.54.10.142

    Quest

    AS19404

    San Jose

    37.3394, -121.8950

    100% uptime

    150ms
    |
    20ms
    |
    54ms
  • 207.126.105.76

    Zayo Bandwidth

    AS6461

    San Jose

    37.3394, -121.8950

    100% uptime

    144ms
    |
    3ms
    |
    153ms
  • 208.92.236.31

    SoftIron

    AS33228

    San Jose

    37.3394, -121.8950

    96% uptime

    143ms
    |
    4ms
    |
    158ms
  • 209.58.135.75

    Leaseweb USA, Inc.

    AS7203

    San Jose

    37.3394, -121.8950

    99% uptime

    142ms
    |
    2ms
    |
    91ms
  • 209.58.137.71

    Leaseweb USA, Inc.

    AS7203

    San Jose

    37.3394, -121.8950

    100% uptime

    142ms
    |
    2ms
    |
    93ms
  • 24.205.255.98

    Charter Communications LLC

    AS20115

    San Luis Obispo

    35.2828, -120.6596

    100% uptime

    176ms
    |
    4ms
    |
    256ms
  • 66.214.205.81

    Charter Communications LLC

    AS20115

    San Luis Obispo

    35.2828, -120.6596

    100% uptime

    174ms
    |
    3ms
    |
    255ms
  • 68.185.84.95

    Charter Communications LLC

    AS20115

    San Luis Obispo

    35.2828, -120.6596

    100% uptime

    175ms
    |
    7ms
    |
    264ms
  • 50.145.34.66

    Comcast Cable Communications, LLC

    AS7922

    San Mateo

    37.5630, -122.3255

    100% uptime

    165ms
    |
    1ms
    |
    152ms
  • 50.145.34.67

    Comcast Cable Communications, LLC

    AS7922

    San Mateo

    37.5630, -122.3255

    100% uptime

    166ms
    |
    1ms
    |
    157ms
  • 169.199.246.6

    Contra Costa County Office of Education

    AS23309

    San Pablo

    37.9622, -122.3455

    100% uptime

    170ms
    |
    1ms
    |
    61ms
  • 50.189.85.91

    Comcast Cable Communications, LLC

    AS7922

    San Rafael

    37.9735, -122.5311

    96% uptime

    178ms
    |
    4ms
    |
    192ms
  • 76.175.8.62

    Charter Communications Inc

    AS20001

    Santa Ana

    33.7456, -117.8678

    96% uptime

    177ms
    |
    7ms
    |
    94ms
  • 47.143.48.189

    Frontier Communications of America, Inc.

    AS5650

    Santa Barbara

    34.4208, -119.6982

    100% uptime

    168ms
    |
    11ms
    |
    235ms
  • 24.144.95.185

    DigitalOcean, LLC

    AS14061

    Santa Clara

    37.3541, -121.9552

    100% uptime

    153ms
    |
    1ms
    |
    84ms
  • 38.59.249.166

    Kirino LLC

    AS41378

    Santa Clara

    37.3924, -121.9623

    100% uptime

    160ms
    |
    3ms
    |
    102ms
  • 38.87.67.231

    Cogent Communications, LLC

    AS174

    Santa Clara

    37.3541, -121.9552

    99% uptime

    161ms
    |
    11ms
    |
    152ms
  • 38.127.228.161

    Lambda

    AS398090

    Santa Clara

    37.3541, -121.9552

    100% uptime

    144ms
    |
    1ms
    |
    105ms
  • 43.130.48.18

    Tencent Building, Kejizhongyi Avenue

    AS132203

    Santa Clara

    37.3541, -121.9552

    100% uptime

    161ms
    |
    2ms
    |
    76ms
  • 43.153.60.2

    Tencent Building, Kejizhongyi Avenue

    AS132203

    Santa Clara

    37.3541, -121.9552

    99% uptime

    159ms
    |
    3ms
    |
    88ms