bfb.cust.net.upc.cz DNS trace

Queried just now

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

AS396661

Anycast IP

2001:503:c27::2:30

AS396661

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

all servers delegate to

cz.

These servers manage the cz zone

a.ns.nic.cz

194.0.12.1

AS25192

Czechia

2001:678:f::1

AS25192

Czechia

b.ns.nic.cz

194.0.13.1

AS25192

Czechia

2001:678:10::1

AS25192

Czechia

c.ns.nic.cz

194.0.14.1

AS200070

Anycast IP

2001:678:11::1

AS200070

Anycast IP

d.ns.nic.cz

193.29.206.1

AS25192

Czechia

2001:678:1::1

AS25192

Czechia

all servers delegate to

upc.cz.

These servers manage the upc.cz zone

ns1.upc.biz

ns2.upc.biz

ns3.upc.biz

These servers claim authority over bfb.cust.net.upc.cz, but say it doesn't exist