demarc.cogentco.com DNS trace

Root zone

These servers manage the DNS root zone

a.root-servers.net

198.41.0.4

AS397197

Anycast IP

2001:503:ba3e::2:30

AS397197

Anycast IP

b.root-servers.net

170.247.170.2

AS394353

Anycast IP

2801:1b8:10::b

AS394353

Anycast IP

c.root-servers.net

192.33.4.12

AS2149

Anycast IP

2001:500:2::c

AS2149

Anycast IP

d.root-servers.net

199.7.91.13

AS10886

Anycast IP

2001:500:2d::d

AS10886

Anycast IP

e.root-servers.net

192.203.230.10

AS21556

Anycast IP

2001:500:a8::e

AS21556

Anycast IP

f.root-servers.net

192.5.5.241

AS3557

Anycast IP

2001:500:2f::f

AS3557

Anycast IP

g.root-servers.net

192.112.36.4

AS5927

Anycast IP

2001:500:12::d0d

AS5927

Anycast IP

h.root-servers.net

198.97.190.53

AS1508

Anycast IP

2001:500:1::53

AS1508

Anycast IP

i.root-servers.net

192.36.148.17

AS29216

Anycast IP

2001:7fe::53

AS29216

Anycast IP

j.root-servers.net

192.58.128.30

AS397197

Anycast IP

2001:503:c27::2:30

AS397197

Anycast IP

k.root-servers.net

193.0.14.129

AS25152

Anycast IP

2001:7fd::1

AS25152

Anycast IP

l.root-servers.net

199.7.83.42

AS20144

Anycast IP

2001:500:9f::42

AS20144

Anycast IP

m.root-servers.net

202.12.27.33

AS7500

Anycast IP

2001:dc3::35

AS7500

Anycast IP

Inconsistent responses

We queried these DNS servers, but not all of them returned the same response. Select a group to see their response.

24 servers a.root-servers.net./198.41.0.4 a.root-servers.net./2001:503:ba3e:0:0:0:2:30 b.root-servers.net./170.247.170.2 b.root-servers.net./2801:1b8:10:0:0:0:0:b c.root-servers.net./192.33.4.12 c.root-servers.net./2001:500:2:0:0:0:0:c d.root-servers.net./199.7.91.13 d.root-servers.net./2001:500:2d:0:0:0:0:d e.root-servers.net./192.203.230.10 e.root-servers.net./2001:500:a8:0:0:0:0:e f.root-servers.net./192.5.5.241 f.root-servers.net./2001:500:2f:0:0:0:0:f h.root-servers.net./198.97.190.53 h.root-servers.net./2001:500:1:0:0:0:0:53 i.root-servers.net./192.36.148.17 i.root-servers.net./2001:7fe:0:0:0:0:0:53 j.root-servers.net./192.58.128.30 j.root-servers.net./2001:503:c27:0:0:0:2:30 k.root-servers.net./193.0.14.129 k.root-servers.net./2001:7fd:0:0:0:0:0:1 l.root-servers.net./199.7.83.42 l.root-servers.net./2001:500:9f:0:0:0:0:42 m.root-servers.net./2001:dc3:0:0:0:0:0:35 m.root-servers.net./202.12.27.33

2 servers (timed out) g.root-servers.net./192.112.36.4 g.root-servers.net./2001:500:12:0:0:0:0:d0d

these servers delegate to

com.

These servers manage the com zone

a.gtld-servers.net

192.5.6.30

AS396549

Anycast IP

2001:503:a83e::2:30

AS396549

Anycast IP

b.gtld-servers.net

192.33.14.30

AS396611

Anycast IP

2001:503:231d::2:30

AS396654

Anycast IP

c.gtld-servers.net

192.26.92.30

AS396549

Anycast IP

2001:503:83eb::30

AS396549

Anycast IP

d.gtld-servers.net

192.31.80.30

AS396549

Anycast IP

2001:500:856e::30

AS396549

Anycast IP

e.gtld-servers.net

192.12.94.30

AS396549

Anycast IP

2001:502:1ca1::30

AS396549

Anycast IP

f.gtld-servers.net

192.35.51.30

AS397197

Anycast IP

2001:503:d414::30

AS397197

Anycast IP

g.gtld-servers.net

192.42.93.30

AS397197

Anycast IP

2001:503:eea3::30

AS397197

Anycast IP

h.gtld-servers.net

192.54.112.30

AS397197

Anycast IP

2001:502:8cc::30

AS397197

Anycast IP

i.gtld-servers.net

192.43.172.30

AS397197

Anycast IP

2001:503:39c1::30

AS397197

Anycast IP

j.gtld-servers.net

192.48.79.30

AS396566

Anycast IP

2001:502:7094::30

AS19836

Anycast IP

k.gtld-servers.net

192.52.178.30

AS396566

Anycast IP

2001:503:d2d::30

AS19836

United States of America

l.gtld-servers.net

192.41.162.30

AS396566

Anycast IP

2001:500:d937::30

AS19836

Anycast IP

m.gtld-servers.net

192.55.83.30

AS396566

Anycast IP

2001:501:b1f9::30

AS19836

United States of America

all servers delegate to

cogentco.com.

These servers manage the cogentco.com zone

auth1.dns.cogentco.com

2001:550:1:a::d

AS174

Anycast IP

66.28.0.14

AS174

Anycast IP

auth2.dns.cogentco.com

66.28.0.30

AS174

Anycast IP

These servers claim authority over demarc.cogentco.com

These servers timed out.