DNS Servers

United States of America 4604 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

  • 136.51.64.77

    Google Fiber Inc.

    AS16591

    San Antonio

    29.4241, -98.4936

    100% uptime

    128ms
    |
    0ms
    |
    155ms
  • 136.51.65.140

    Google Fiber Inc.

    AS16591

    San Antonio

    29.4241, -98.4936

    100% uptime

    130ms
    |
    1ms
    |
    169ms
  • 172.124.201.90

    AT&T Enterprises, LLC

    AS7018

    San Antonio

    29.4241, -98.4936

    99% uptime

    138ms
    |
    14ms
    |
    199ms
  • 50.209.143.169

    Comcast Cable Communications, LLC

    AS7922

    San Carlos

    37.5072, -122.2605

    100% uptime

    174ms
    |
    1ms
    |
    146ms
  • 23.113.3.185

    AT&T Enterprises, LLC

    AS7018

    San Diego

    32.7157, -117.1647

    94% uptime

    168ms
    |
    11ms
    |
    196ms
  • 70.166.13.25

    Cox Communications Inc.

    AS22773

    San Diego

    32.7157, -117.1647

    100% uptime

    182ms
    |
    6ms
    |
    279ms
  • 98.153.11.222

    Charter Communications Inc

    AS20001

    San Diego

    32.7157, -117.1647

    100% uptime

    180ms
    |
    2ms
    |
    202ms
  • 98.175.111.42

    Cox Communications Inc.

    AS22773

    San Diego

    32.7157, -117.1647

    98% uptime

    180ms
    |
    3ms
    |
    258ms
  • 98.176.221.147

    Cox Communications Inc.

    AS22773

    San Diego

    32.7157, -117.1647

    100% uptime

    184ms
    |
    3ms
    |
    221ms
  • 147.203.215.99

    LightEdge Solutions

    AS11320

    San Diego

    32.7157, -117.1647

    100% uptime

    151ms
    |
    2ms
    |
    138ms
  • 173.198.121.238

    Charter Communications Inc

    AS20001

    San Diego

    32.7157, -117.1647

    100% uptime

    180ms
    |
    2ms
    |
    55ms
  • 174.78.176.129

    Cox Communications Inc.

    AS22773

    San Diego

    32.7157, -117.1647

    99% uptime

    173ms
    |
    3ms
    |
    228ms
  • 184.177.164.229

    Cox Communications Inc.

    AS22773

    San Diego

    32.7157, -117.1647

    94% uptime

    174ms
    |
    3ms
    |
    308ms
  • 199.48.225.212

    Mexico Internet Exchange

    AS395565

    San Diego

    32.7157, -117.1647

    100% uptime

    145ms
    |
    15ms
    |
    178ms
  • 216.240.173.2

    LightEdge Solutions

    AS11320

    San Diego

    32.7157, -117.1647

    100% uptime

    166ms
    |
    3ms
    |
    82ms
  • 216.240.173.3

    LightEdge Solutions

    AS11320

    San Diego

    32.7157, -117.1647

    100% uptime

    151ms
    |
    1ms
    |
    106ms
  • 216.240.173.164

    LightEdge Solutions

    AS11320

    San Diego

    32.7157, -117.1647

    100% uptime

    151ms
    |
    2ms
    |
    110ms
  • 4.38.245.124

    Level 3 Parent, LLC

    AS3356

    Sandston

    37.5235, -77.3158

    100% uptime

    101ms
    |
    0ms
    |
    66ms
  • 65.175.252.189

    Breezeline

    AS11776

    Sanford

    43.4393, -70.7742

    100% uptime

    108ms
    |
    3ms
    |
    162ms
  • 23.93.100.137

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    163ms
    |
    2ms
    |
    198ms
  • 38.88.217.98

    Cogent Communications, LLC

    AS174

    San Francisco

    37.7749, -122.4194

    99% uptime

    162ms
    |
    1ms
    |
    132ms
  • 38.107.165.46

    BLUE WIRELESS PTE LTD

    AS137182

    San Francisco

    37.7749, -122.4194

    100% uptime

    215ms
    |
    18ms
    |
    81ms
  • 45.55.0.4

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    149ms
    |
    2ms
    |
    60ms
  • 45.55.3.11

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    1ms
    |
    129ms
  • 73.71.128.45

    Comcast Cable Communications, LLC

    AS7922

    San Francisco

    37.7749, -122.4194

    100% uptime

    175ms
    |
    2ms
    |
    300ms
  • 75.10.224.104

    San Francisco Municipal Transportation Agency

    AS395733

    San Francisco

    37.7749, -122.4194

    100% uptime

    157ms
    |
    1ms
    |
    137ms
  • 104.131.129.156

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7309, -122.3886

    99% uptime

    152ms
    |
    4ms
    |
    67ms
  • 104.131.140.24

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    2ms
    |
    57ms
  • 104.131.151.41

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    94% uptime

    150ms
    |
    2ms
    |
    56ms
  • 104.236.131.109

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    94% uptime

    150ms
    |
    1ms
    |
    82ms
  • 104.236.145.70

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    2ms
    |
    73ms
  • 104.236.150.51

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    1ms
    |
    68ms
  • 107.170.230.174

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7309, -122.3886

    100% uptime

    148ms
    |
    2ms
    |
    72ms
  • 135.180.106.163

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    163ms
    |
    1ms
    |
    194ms
  • 135.180.107.93

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    162ms
    |
    1ms
    |
    213ms
  • 136.24.119.228

    Webpass Inc.

    AS19165

    San Francisco

    37.7749, -122.4194

    99% uptime

    154ms
    |
    2ms
    |
    102ms
  • 136.24.138.126

    Webpass Inc.

    AS19165

    San Francisco

    37.7749, -122.4194

    100% uptime

    155ms
    |
    2ms
    |
    72ms
  • 136.25.84.81

    Webpass Inc.

    AS19165

    San Francisco

    37.7749, -122.4194

    94% uptime

    152ms
    |
    1ms
    |
    106ms
  • 136.25.123.217

    Webpass Inc.

    AS19165

    San Francisco

    37.7749, -122.4194

    94% uptime

    154ms
    |
    1ms
    |
    96ms
  • 138.68.208.245

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    1ms
    |
    75ms
  • 138.68.222.69

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    148ms
    |
    7ms
    |
    71ms
  • 142.254.95.38

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    164ms
    |
    1ms
    |
    191ms
  • 148.64.108.4

    Another Corporate ISP, LLC

    AS32329

    San Francisco

    37.7749, -122.4194

    94% uptime

    143ms
    |
    1ms
    |
    108ms
  • 149.52.76.169

    SkyQuantum Internet Service

    AS55201

    San Francisco

    37.7749, -122.4194

    94% uptime

    141ms
    |
    0ms
    |
    66ms
  • 157.131.68.159

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    94% uptime

    163ms
    |
    0ms
    |
    182ms
  • 157.131.76.252

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    161ms
    |
    0ms
    |
    183ms
  • 157.131.115.33

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    164ms
    |
    1ms
    |
    190ms
  • 159.203.212.105

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    153ms
    |
    1ms
    |
    148ms
  • 161.115.62.180

    Another Corporate ISP, LLC

    AS32329

    San Francisco

    37.7749, -122.4194

    100% uptime

    144ms
    |
    0ms
    |
    170ms
  • 162.243.133.229

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    2ms
    |
    50ms
  • 162.243.135.243

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    148ms
    |
    2ms
    |
    71ms
  • 162.243.141.9

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    1ms
    |
    71ms
  • 162.243.141.190

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    1ms
    |
    80ms
  • 162.243.143.231

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    150ms
    |
    2ms
    |
    68ms
  • 173.228.31.6

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    188ms
    |
    4ms
    |
    495ms
  • 173.228.65.169

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    163ms
    |
    0ms
    |
    212ms
  • 176.108.136.248

    Another Corporate ISP, LLC

    AS32329

    San Francisco

    37.7749, -122.4194

    94% uptime

    149ms
    |
    1ms
    |
    101ms
  • 192.241.194.39

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    94% uptime

    150ms
    |
    1ms
    |
    65ms
  • 192.241.195.212

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    1ms
    |
    71ms
  • 192.241.203.157

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    59ms
  • 192.241.209.252

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    149ms
    |
    2ms
    |
    69ms
  • 192.241.214.141

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    155ms
  • 194.147.71.84

    VIRTUASYS America, Inc.

    AS21641

    San Francisco

    37.7749, -122.4194

    94% uptime

    377ms
    |
    0ms
    |
    473ms
  • 198.27.144.220

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    100% uptime

    165ms
    |
    1ms
    |
    187ms
  • 198.27.235.59

    Sonic Telecom LLC

    AS46375

    San Francisco

    37.7749, -122.4194

    94% uptime

    163ms
    |
    0ms
    |
    348ms
  • 198.199.92.86

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    152ms
    |
    2ms
    |
    59ms
  • 198.199.93.105

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    162ms
  • 198.199.93.152

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    66ms
  • 198.199.94.93

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    149ms
    |
    2ms
    |
    73ms
  • 198.199.94.146

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    148ms
    |
    2ms
    |
    67ms
  • 198.199.95.243

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    150ms
    |
    3ms
    |
    71ms
  • 198.199.96.52

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    2ms
    |
    72ms
  • 198.199.97.13

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    2ms
    |
    66ms
  • 198.199.97.247

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    148ms
    |
    2ms
    |
    69ms
  • 198.199.102.102

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    94% uptime

    153ms
    |
    1ms
    |
    53ms
  • 198.199.102.118

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    67ms
  • 198.199.103.88

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    154ms
    |
    1ms
    |
    67ms
  • 198.199.103.207

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    2ms
    |
    71ms
  • 198.199.103.243

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    148ms
    |
    12ms
    |
    59ms
  • 198.199.105.92

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    2ms
    |
    66ms
  • 198.199.107.125

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7309, -122.3886

    99% uptime

    151ms
    |
    2ms
    |
    58ms
  • 198.199.110.15

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    56ms
  • 198.199.111.100

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    66ms
  • 198.199.112.88

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    151ms
    |
    2ms
    |
    69ms
  • 198.199.115.72

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    14ms
    |
    69ms
  • 198.199.116.133

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    99% uptime

    151ms
    |
    2ms
    |
    57ms
  • 198.199.118.170

    DigitalOcean, LLC

    AS14061

    San Francisco

    37.7749, -122.4194

    100% uptime

    150ms
    |
    1ms
    |
    59ms
  • 47.222.1.49

    Optimum

    AS19108

    Sanger

    33.3632, -97.1739

    100% uptime

    147ms
    |
    2ms
    |
    294ms
  • 13.64.117.187

    Microsoft Corporation

    AS8075

    San Jose

    37.3394, -121.8950

    100% uptime

    156ms
    |
    3ms
    |
    19ms
  • 20.157.90.86

    Microsoft Corporation

    AS8069

    San Jose

    37.3394, -121.8950

    100% uptime

    161ms
    |
    2ms
    |
    202ms
  • 23.168.184.1

    Kasumi Networks NA LLC

    AS30307

    San Jose

    37.3394, -121.8950

    99% uptime

    160ms
    |
    1ms
    |
    135ms
  • 23.188.240.203

    Metro Communications Company

    AS19625

    San Jose

    37.3394, -121.8950

    100% uptime

    141ms
    |
    0ms
    |
    115ms
  • 23.247.136.237

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    100% uptime

    141ms
    |
    0ms
    |
    18ms
  • 23.247.137.187

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    6ms
    |
    19ms
  • 23.247.137.190

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    100% uptime

    141ms
    |
    0ms
    |
    83ms
  • 23.247.137.191

    Black Mesa Corporation

    AS46997

    San Jose

    37.3394, -121.8950

    98% uptime

    141ms
    |
    8ms
    |
    70ms
  • 24.4.245.206

    Comcast Cable Communications, LLC

    AS7922

    San Jose

    37.3394, -121.8950

    100% uptime

    176ms
    |
    3ms
    |
    290ms
  • 38.70.200.197

    Sky Fiber Internet

    AS32212

    San Jose

    37.3394, -121.8950

    99% uptime

    167ms
    |
    0ms
    |
    194ms
  • 38.70.200.239

    Sky Fiber Internet

    AS32212

    San Jose

    37.3394, -121.8950

    100% uptime

    167ms
    |
    0ms
    |
    190ms
  • 38.77.233.2

    Tcloudnet

    AS399077

    San Jose

    37.3394, -121.8950

    100% uptime

    161ms
    |
    0ms
    |
    188ms