krtek.cz - robtex.com

krtek.cz

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:47dc🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3033::ac43:95b3🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.71.220Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.149.179🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSguy.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3bad🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A2803:f800:50::6ca2:c1ad🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRguy.ns.cloudflare.com
A2a06:98c1:50::ac40:21ad🇺🇸 Cloudflare2a06:98c1:50::/45
PTRguy.ns.cloudflare.com
A108.162.193.173🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A172.64.33.173🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
A173.245.59.173🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRguy.ns.cloudflare.com
NSursula.ns.cloudflare.com
A2606:4700:50::a29f:26bf🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRursula.ns.cloudflare.com
A2803:f800:50::6ca2:c2bf🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRursula.ns.cloudflare.com
A2a06:98c1:50::ac40:22bf🇺🇸 Cloudflare2a06:98c1:50::/45
PTRursula.ns.cloudflare.com
A108.162.194.191🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRursula.ns.cloudflare.com
A162.159.38.191Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRursula.ns.cloudflare.com
A172.64.34.191🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRursula.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.71.220, 172.67.149.179
IPv62606:4700:3033::6815:47dc, 2606:4700:3033::ac43:95b3
SOAguy.ns.cloudflare.comdns@cloudflare.com serial=2398553624

cz

DNSSEC🔒 Signed (DS record present)
NSa.ns.nic.cz ⭐
NSb.ns.nic.cz
NSc.ns.nic.cz
NSd.ns.nic.cz
SOAa.ns.nic.czhostmaster@nic.cz serial=1774480638

Subdomains

ns.krtek.cz

Same first word

krtek.net
krtek.at
krtek.cz
krtek.de
krtek.be
krtek.meme

Similar names

trekk.hu
trekk.at
trekk.herokuapp.com
ktrek.com
trekk.de
tkker.com
trekk.co.uk
trekk.ca
krekt.net
trekk.net
trekk.it
terkk.com
trekk.biz
trekk.eu
kkert.com
trekk.com.au
trekk.fr
trekk.ch
trekk.com

DNS History

19 records (6 active, 13 former)

201020122014201620182020202220242026NSguy.ns.cloudflare.comursula.ns.cloudflare.comns.forpsi.cnns.forpsi.czns.forpsi.netns.forpsi.usns1.parkingcrew.netns2.parkingcrew.netMXmail-redir.forpsi.commail.h-email.netmxavas.forpsi.composta.krtek.czA104.21.71.220172.67.149.1792606:4700:3033::6815:47dc2606:4700:3033::ac43:95b3104.247.81.9986.49.39.11589.176.107.183
●NSguy.ns.cloudflare.com2026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
○NSns.forpsi.cn2009-01-14 → 2020-01-09 · 4 obs
● 2009-01-14 00:03:06
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32
○NSns.forpsi.cz2009-01-14 → 2020-01-09 · 4 obs
● 2009-01-14 00:03:06
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32
○NSns.forpsi.net2009-01-14 → 2020-01-09 · 4 obs
● 2009-01-14 00:03:06
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32
○NSns.forpsi.us2009-01-14 → 2020-01-09 · 4 obs
● 2009-01-14 00:03:06
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32
○NSns1.parkingcrew.net2026-03-09 → 2026-03-09 · 4 obs
○ 2020-01-09 14:20:14
● 2026-03-09 08:28:24
○ 2026-03-26 00:02:30
○ 2026-03-26 00:02:32
○NSns2.parkingcrew.net2026-03-09 → 2026-03-09 · 4 obs
○ 2020-01-09 14:20:14
● 2026-03-09 08:28:24
○ 2026-03-26 00:02:30
○ 2026-03-26 00:02:32
●NSursula.ns.cloudflare.com2026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
○MXmail-redir.forpsi.com2009-01-14 → 2009-01-14 · 3 obs
● 2009-01-14 00:03:06
○ 2015-08-10 00:21:40
○ 2026-03-26 00:02:32
○MXmail.h-email.net2026-03-09 → 2026-03-09 · 4 obs
○ 2020-01-09 14:20:14
● 2026-03-09 08:28:24
○ 2026-03-26 00:02:30
○ 2026-03-26 00:02:32
○MXmxavas.forpsi.com2015-08-10 → 2020-01-09 · 5 obs
○ 2009-01-14 00:03:06
● 2015-08-10 00:21:40
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32
○MXposta.krtek.cz2009-01-14 → 2009-01-14 · 3 obs
● 2009-01-14 00:03:06
○ 2015-08-10 00:21:40
○ 2026-03-26 00:02:32
●A104.21.71.2202026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
○A104.247.81.992026-03-09 → 2026-03-09 · 4 obs
○ 2020-01-09 14:20:14
● 2026-03-09 08:28:24
○ 2026-03-26 00:02:30
○ 2026-03-26 00:02:32
●A172.67.149.1792026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
●A2606:4700:3033::6815:47dc2026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
●A2606:4700:3033::ac43:95b32026-03-26 → 2026-03-26 · 3 obs
○ 2026-03-09 08:28:24
● 2026-03-26 00:02:30
● 2026-03-26 00:02:32
○A86.49.39.1152009-01-14 → 2009-01-14 · 3 obs
● 2009-01-14 00:03:06
○ 2015-08-10 00:21:40
○ 2026-03-26 00:02:32
○A89.176.107.1832015-08-10 → 2020-01-09 · 5 obs
○ 2009-01-14 00:03:06
● 2015-08-10 00:21:40
● 2020-01-09 14:20:14
○ 2026-03-09 08:28:24
○ 2026-03-26 00:02:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
krtek.czguy.ns.cloudflare.com, ursula.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.173

NS records: guy.ns.cloudflare.com, ursula.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for krtek.cz (unsigned zone)

⏱️ Timing

Total: 1011ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.71.220, 172.67.149.179
AAAA22606:4700:3033::ac43:95b3, 2606:4700:3033::6815:47dc
NS2guy.ns.cloudflare.com, ursula.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1guy.ns.cloudflare.com dns.cloudflare.com

Analysis

Hierarchy

krtek.cz is the parent of ns.krtek.cz.

IP Addresses

krtek.cz points to four IP numbers: 2606:4700:3033::6815:47dc, 2606:4700:3033::ac43:95b3, 104.21.71.220 and 172.67.149.179.

For instance, other host names s23.datoid.com, h(0x736578)pert.nl, www.modernbrainjournal.org, 114y.cn and s10.datoid.com share IP numbers with krtek.cz.

Name Servers

krtek.cz is delegated to two name servers: guy.ns.cloudflare.com and ursula.ns.cloudflare.com.

krtek.cz uses the same name server setup as other domains such as kerosin.eu, ajp.cz, agrotip.cz, medispa.cz and inks.cz.

krtek.cz shares name servers with other domains at least partially, for example ozis.lt, 2178687569.workers.dev, line-of-defense.com, basicinsight.us and axiomdata.io.

These name servers are commonly used with the name servers yevgen.ns.cloudflare.com and randy.ns.cloudflare.com.

Host names with six IP numbers: host name guy.ns.cloudflare.com points to: 2606:4700:58::adf5:3bad, 2803:f800:50::6ca2:c1ad, 2a06:98c1:50::ac40:21ad, 108.162.193.173, 172.64.33.173 and 173.245.59.173; host name ursula.ns.cloudflare.com points to: 2606:4700:50::a29f:26bf, 2803:f800:50::6ca2:c2bf, 2a06:98c1:50::ac40:22bf, 108.162.194.191, 162.159.38.191 and 172.64.34.191.