Site Toolbox
Start IPEnd IPGeographic location
4.2.2.14.2.2.6DNS server of Level3 Communications, Broomfield, Colorado, USA
8.2.208.58.2.208.5DNS server of Level3 Communications, Broomfield, Colorado, USA
8.8.4.48.8.4.4DNS server of Google, Mountain View, California, USA
8.8.8.88.8.8.8DNS server of Google, Mountain View, California, USA
8.8.192.358.8.192.35DNS server of Level3 Communications, Broomfield, Colorado, USA
12.17.136.13112.17.136.131ATT DNS server, USA
12.25.232.11512.25.232.115ATT DNS server, USA
12.32.34.3312.32.34.33ATT DNS server, USA
12.49.240.6812.49.240.68ATT DNS server, USA
12.166.30.212.166.30.2ATT DNS server, USA
12.180.165.4012.180.165.40ATT DNS server, USA
24.154.1.424.154.1.5Ohio, US DNS server
24.197.96.1624.197.96.16Missouri, US DNS server
24.237.132.524.237.132.5Alaska, US DNS server
38.98.1.538.98.1.5DNS server of Cogent Communications, Washington, D.C., USA
38.98.10.13238.98.10.132DNS server of Cogent Communications, Washington, D.C., USA
38.116.192.1138.116.192.11DNS server of Cogent Communications, Washington, D.C., USA
48.6.16.24548.6.16.245US Cox Communications DNS server
63.76.176.25263.76.176.252US NIC registrar DNS server
63.88.42.563.88.42.5US NIC registrar DNS server
63.135.48.13063.135.48.130US NIC registrar DNS server
63.148.170.1163.148.170.11DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
63.150.244.1663.150.244.16DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
63.245.14.19663.245.14.196Florida, USA DNS server
63.251.129.3363.251.129.33US Internap network DNS server
64.4.129.25064.4.129.250California, US DNS server
64.13.32.564.13.32.5California, US DNS server
64.13.48.1264.13.48.12California, US DNS server
64.13.131.3464.13.131.34California, US DNS server
64.30.215.12964.30.215.129California, US DNS server
64.57.176.1264.57.176.12California, US DNS server
64.58.4.264.58.4.2California, US DNS server
64.58.15.264.58.15.2California, US DNS server
64.58.254.264.58.254.2California, US DNS server
64.79.224.364.79.224.3California, US DNS server
64.79.224.2764.79.224.27California, US DNS server
64.85.177.1064.85.177.11California, US DNS server
64.89.247.1564.89.247.15California, US DNS server
64.90.209.5364.90.209.53California, US DNS server
64.91.89.264.91.89.2California, US DNS server
64.105.97.9064.105.97.90California, US DNS server
64.105.152.18664.105.152.186California, US DNS server
64.118.80.14164.118.80.141California, US DNS server
64.119.60.564.119.60.5California, US DNS server
64.119.60.964.119.60.9California, US DNS server
64.129.67.10164.129.67.101California, US DNS server
64.135.2.25064.135.2.250California, US DNS server
64.140.128.1064.140.128.10California, US DNS server
64.146.192.1664.146.192.16California, US DNS server
64.149.136.20164.149.136.201California, US DNS server
64.192.0.1064.192.0.10US Williams Communications Group DNS server
64.207.64.564.207.64.5California, US DNS server
65.39.139.5365.39.139.53US Peer1Nerwork DNS server
65.54.238.7065.54.238.70US Microsoft DNS server
65.88.88.265.88.88.2US Broadwing Communications DNS server
65.125.132.165.125.132.1DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
65.248.165.1165.248.165.11UUNET DNS server, US
66.75.160.3966.75.160.39RoadRunner Holding LLC DNS server, USA
66.79.162.066.79.188.255XIDNS data center, California, USA
66.199.228.25466.199.228.254New York City, USA DNS server
66.207.155.3166.207.155.31Pennsylvania, US DNS server
66.207.199.4466.207.199.44US Beanfield DNS server
66.218.224.4066.218.224.40DNS server of CableAmerica, USA
66.218.245.1066.218.245.10DNS server of CableAmerica, USA
66.218.245.1366.218.245.13DNS server of CableAmerica, USA
67.15.193.16267.15.193.171US ThePlanet data center DNS server
67.199.112.2167.199.112.21Virginia, USA DNS server
67.201.32.1167.201.32.12Virginia, USA DNS server
67.214.64.667.214.64.7Virginia, USA DNS server
67.214.64.2867.214.64.28Virginia, USA DNS server
67.215.64.067.215.95.255OpenDNS LLC, San Francisco, California, USA
68.28.154.1168.28.154.11California, US DNS server
68.87.64.15468.87.64.154DNS server of Comcast Cable Communications, Mount Laurel, New Jersey, USA
68.87.64.19968.87.64.199DNS server of Comcast Cable Communications, Mount Laurel, New Jersey, USA
68.87.66.19968.87.66.199DNS server of Comcast Cable Communications, Mount Laurel, New Jersey, USA
68.208.149.22668.208.149.226Southern Bell, US DNS server
68.234.128.7068.234.128.70US Coudersport, Pennsylvania DNS server
69.59.32.969.59.32.9US CafeNetwork DNS server
69.155.200.669.155.200.6St. Louis, Missouri, US DNS server
70.254.229.270.254.229.2US Northeastern seven-state telecom network DNS server
71.15.32.971.15.32.9St. Louis, Missouri, US DNS server
72.14.202.8072.14.202.87DNS server of Google, Mountain View, California, USA
72.22.224.372.22.224.3Maine/New Hampshire, USA DNS server
72.29.162.1772.29.162.17Maine/New Hampshire, USA DNS server
72.37.141.9172.37.141.91Maine/New Hampshire, USA DNS server
72.51.175.1072.51.175.11Florida, USA DNS server
72.233.151.5172.233.151.51US San Francisco, California DNS server
74.84.119.15074.84.119.150DNS server of Mediacom Communications, Middletown, Orange County, New York, USA
74.84.119.15374.84.119.153DNS server of Mediacom Communications, Middletown, Orange County, New York, USA
74.125.152.8074.125.152.82DNS server of Google, Mountain View, California, USA
74.222.30.274.222.30.2Vrtservers DNS server, Los Angeles, California, USA
75.126.98.10875.126.98.108SoftLayer Technologies DNS server, Dallas, Texas, USA
76.10.67.276.10.67.2IdeaOne Telecom DNS server in Fargo, Cass County, North Dakota, USA
76.14.0.876.14.0.9IdeaOne Telecom DNS server in Fargo, Cass County, North Dakota, USA
76.14.96.1376.14.96.14IdeaOne Telecom DNS server in Fargo, Cass County, North Dakota, USA
76.14.192.876.14.192.9IdeaOne Telecom DNS server in Fargo, Cass County, North Dakota, USA
76.77.208.2376.77.208.24Carson Communications LLC DNS server, Hiawatha, Brown County, Kansas, US
128.2.200.100128.2.200.100US Carnegie Mellon University DNS server
128.8.10.90128.8.10.90University of Maryland, US DNS server
128.63.2.53128.63.2.53US Maryland DNS server
128.114.129.105128.114.129.105US University of California DNS server
128.143.2.126128.143.2.126University of Virginia, US DNS server
128.143.3.7128.143.3.7University of Virginia, US DNS server
128.143.22.119128.143.22.119University of Virginia, US DNS server
129.66.20.6129.66.20.6Supercomputing Center DNS server, Alabama, USA
129.66.95.3129.66.95.3Supercomputing Center DNS server, Alabama, USA
129.66.172.9129.66.172.9Supercomputing Center DNS server, Alabama, USA
129.71.1.1129.71.1.1US West Virginia Network Education DNS server
129.108.202.20129.108.202.20University of Texas, USA DNS server
129.113.38.36129.113.38.36University of Texas, USA DNS server
129.137.254.4129.137.254.4University of Cincinnati, USA DNS server
129.137.255.4129.137.255.4University of Cincinnati, USA DNS server
131.94.134.129131.94.134.129US Florida International University DNS server
131.247.100.1131.247.100.1US University of South Florida DNS server
132.170.249.15132.170.249.15US University of Central Florida DNS server
155.135.55.2155.135.55.2California State University, US DNS server
161.45.25.37161.45.25.37US Tennessee DNS server
161.45.193.4161.45.193.4US Tennessee DNS server
164.214.4.52164.214.4.52US Maryland DNS server
165.95.31.17165.95.31.17US Texas A&M University DNS server
168.143.113.201168.143.113.202Englewood, US DNS server
173.71.0.35173.71.0.35VerizonInternetServices DNS server, Reston, Virginia, US
174.34.129.34174.34.129.34US theplanet DNS server
174.37.59.9174.37.59.9SoftLayer Technologies DNS server, Dallas, Texas, USA
174.120.16.34174.120.16.34ThePlanet internet service provider DNS server, Houston, Texas, USA
192.5.5.241192.5.5.241California, US DNS server
192.58.128.30192.58.128.30Virginia, USA DNS server
192.112.36.4192.112.36.4Virginia, USA DNS server
192.203.230.10192.203.230.10California, US DNS server
198.41.0.4198.41.0.4Virginia, USA DNS server
198.153.192.1198.153.192.1Norton DNS server of Symantec Corporation, Cupertino, Santa Clara County, California, USA
198.153.194.1198.153.194.1Norton DNS server of Symantec Corporation, Cupertino, Santa Clara County, California, USA
205.160.52.53205.160.52.53ChickasawTelecommunicationsServices(CTS) DNS server, Zhishui, Oklahoma, USA
205.171.2.65205.171.2.65DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
205.171.3.25205.171.3.25DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
205.171.3.65205.171.3.65DNS server of Qwest Communications Company, LLC, Denver, Colorado, USA
208.67.216.0208.67.223.255OpenDNS LLC, San Francisco, California, USA
208.69.32.0208.69.39.255OpenDNS LLC, San Francisco, California, USA
208.196.63.2208.196.63.2DNS server of MCI Communications Services, Ashburn area, Loudoun County, Virginia, USA
208.218.130.5208.218.130.5DNS server of MCI Communications Services, Ashburn area, Loudoun County, Virginia, USA
208.246.8.14208.246.8.14DNS server of MCI Communications Services, Ashburn area, Loudoun County, Virginia, USA
209.44.0.3209.44.0.4US Broomfield DNS server
216.87.84.211216.87.84.211ViaWest DNS server, Denver, Colorado, USA
216.211.190.3216.211.190.3New York City, USA DNS server
216.211.191.3216.211.191.3New York City, USA DNS server
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How to use

This tool belongs to the “Network diagnostics” category.

  1. 1Enter a domain, IP or full URL, without stray spaces around the scheme.
  2. 2Run the lookup and wait; multi-region checks need a moment to collect every response.
  3. 3Copy the findings (status code, TTL, latency) and line them up against your own logs.

Your input is processed locally in the browser whenever possible. We do not store it.

Frequently asked questions

Why is the result different from my server?

Checks originate from our own data centre, so the network path differs from yours. Differences are normal for cross-border results or carrier-level caches.

The check timed out

The target may block probes, rate-limit them, or serve only certain regions. Retry with another tool or at another time.

Can it probe private addresses?

No. Loopback, private and reserved ranges are refused so the tools cannot be used to scan internal networks.