shark.cz - robtex.com

shark.cz

DNSSEC⚠️ Not signed
A91.239.201.14🇨🇿 Blindspot91.239.200.0/23 THINLINE-BlindSpot
PTRrproxy3.thinline.cz
NSns1.regzone.cz ⭐
A2a00:19a0:3:71:0:d9c6:710a:1🇨🇿 ZONER-AS2a00:19a0::/32 ZONER-IPV6-NET
PTRns1.regzone.cz
A217.198.113.10🇨🇿 ZONER-AS217.198.112.0/20 ZONER-NET
PTRns1.regzone.cz
NSns1.regzone.de
A2600:3c02::f03c:91ff:fedb:a6e7🇺🇸 AKAMAI-LINODE-AP2600:3c02::/32 Akamai Technologies
PTRns1.regzone.de
A23.92.29.43🇺🇸 AKAMAI-LINODE-AP23.92.28.0/22 Akamai Technologies
PTRns1.regzone.de
NSns1.regzone.info
A2001:1528:147::10🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network
PTRns1.regzone.info
A81.0.233.10🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT
PTRns1.regzone.info
MXrelay.zoner.com ⭐
A217.198.120.100🇨🇿 ZONER-AS217.198.112.0/20 ZONER-NET
PTRrelay.zoner.com
MX10mx.zoner.com(10)
A217.198.120.36🇨🇿 ZONER-AS217.198.112.0/20 ZONER-NET
PTR10mx.zoner.com
MX15mx.zoner.com(15)
A81.0.233.6🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT
PTR15mx.zoner.com
TXTv=spf1 include:spf-zoner-zmail.zoner.com -all
SOAns1.regzone.czadministrator@czechia.cz 2026-06-22 #2

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=1784510240

Same first word

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shark.email
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shark.im
shark.fund
shark.co.jp
shark.media
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krash.cn
shakr.map.fastly.net
krash.us
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rkash.cn
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krahs.myshopify.com
karsh.info
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kahrs.sk
krash.de
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sakhr.info

DNS History

25 records (7 active, 18 former)

20162017201820192020202120222023202420252026NSns1.regzone.czns1.regzone.dens1.regzone.infons.tiberia.czns1.thinline.czns2.blueboard.czns2.thinline.czns2.tiberia.czns3.cesky-hosting.eushinzon.blueboard.czMX10mx.zoner.com15mx.zoner.comrelay.zoner.comalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comjaguar.blueboard.czmail.prolidi.czns2.blueboard.czA91.239.201.142001:1528:240::29217.11.249.1452a00:1ed0:2:1:1:5bef:c90e:1
○NSns.tiberia.cz2015-07-19 → 2015-11-28 · 4 obs
● 2015-07-19 20:12:50
● 2015-11-28 23:24:02
○ 2016-03-06 09:11:46
○ 2026-07-20 01:49:04
●NSns1.regzone.cz2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
●NSns1.regzone.de2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
●NSns1.regzone.info2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
○NSns1.thinline.cz2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○NSns2.blueboard.cz2016-03-06 → 2017-01-02 · 5 obs
○ 2015-11-28 23:24:02
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
○NSns2.thinline.cz2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○NSns2.tiberia.cz2015-07-19 → 2015-11-28 · 4 obs
● 2015-07-19 20:12:50
● 2015-11-28 23:24:02
○ 2016-03-06 09:11:46
○ 2026-07-20 01:49:04
○NSns3.cesky-hosting.eu2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○NSshinzon.blueboard.cz2016-03-06 → 2017-01-02 · 5 obs
○ 2015-11-28 23:24:02
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
●MX10mx.zoner.com2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
●MX15mx.zoner.com2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
○MXalt1.aspmx.l.google.com2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○MXalt2.aspmx.l.google.com2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○MXaspmx.l.google.com2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○MXaspmx2.googlemail.com2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○MXaspmx3.googlemail.com2018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
○MXjaguar.blueboard.cz2016-03-06 → 2017-01-02 · 5 obs
○ 2015-11-28 23:24:02
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
○MXmail.prolidi.cz2015-07-19 → 2015-11-28 · 4 obs
● 2015-07-19 20:12:50
● 2015-11-28 23:24:02
○ 2016-03-06 09:11:46
○ 2026-07-20 01:49:04
○MXns2.blueboard.cz2016-03-06 → 2017-01-02 · 5 obs
○ 2015-11-28 23:24:02
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
●MXrelay.zoner.com2026-06-14 → 2026-07-20 · 3 obs
○ 2018-01-16 01:07:44
● 2026-06-14 14:27:08
● 2026-07-20 01:49:04
○A2001:1528:240::292016-03-06 → 2017-01-02 · 4 obs
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
○A217.11.249.1452016-03-06 → 2017-01-02 · 4 obs
● 2016-03-06 09:11:46
● 2017-01-02 16:35:10
○ 2018-01-16 01:07:44
○ 2026-07-20 01:49:04
○A2a00:1ed0:2:1:1:5bef:c90e:12018-01-16 → 2018-01-16 · 4 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
○ 2026-06-14 14:27:08
○ 2026-07-20 01:49:04
●A91.239.201.142018-01-16 → 2026-07-20 · 3 obs
○ 2017-01-02 16:35:10
● 2018-01-16 01:07:44
● 2026-07-20 01:49:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
czc.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz-
shark.czns1.regzone.info, ns1.regzone.cz, ns1.regzone.de2 records

✅ Authoritative Response

Server:81.0.233.10

NS records: ns1.regzone.info, ns1.regzone.cz, ns1.regzone.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for shark.cz (unsigned zone)

⏱️ Timing

Total: 1029ms | Queries: -

📄 Records

TypeCountSample Data
A191.239.201.14
NS3ns1.regzone.cz, ns1.regzone.de...
MX3relay.zoner.com (pri: 1), 10mx.zoner.com (pri: 10)...
TXT1v=spf1 include:spf-zoner-zmail.zoner.com
SOA1ns1.regzone.cz administrator.czechia.cz

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.regzone.cz, ns1.regzone.cz)

Analysis

IP Addresses

shark.cz directs to one IP number, which is 91.239.201.14.

Among the host names that share IP numbers with shark.cz are uzijsito.cz, sattech.cz, wimhof.cz and two others.

Name Servers

DNS for shark.cz is handled by three authoritative name servers: ns1.regzone.cz, ns1.regzone.de and ns1.regzone.info.

shark.cz partially shares its NS delegation with several other domains, including zoner.co.in, telchotels.cz, lakler.com and two others.

Three hostnames — ns1.regzone.cz, ns1.regzone.de and ns1.regzone.info — each have two IP addresses: ns1.regzone.cz has 217.198.113.10 and 2a00:19a0:3:71:0:d9c6:710a:1, ns1.regzone.de has 23.92.29.43 and 2600:3c02::f03c:91ff:fedb:a6e7, and ns1.regzone.info has 81.0.233.10 and 2001:1528:147::10.

Mail Servers

shark.cz uses three mail servers — 10mx.zoner.com, 15mx.zoner.com and relay.zoner.com.

shark.cz shares at least some of its mail servers with other domains — for example defcon.cz, whizard.cz, dps.eu and two more.

10mx.zoner.com, 15mx.zoner.com and relay.zoner.com all have one IP address each — 10mx.zoner.com directs to 217.198.120.36, 15mx.zoner.com directs to 81.0.233.6 and relay.zoner.com directs to 217.198.120.100.