`13.cz`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:a299^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:f7a^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.15.122^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.162.153^{🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`kianchau.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cb3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kianchau.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3b3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`kianchau.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23b3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`kianchau.ns.cloudflare.com`
		A	108.162.195.179^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kianchau.ns.cloudflare.com`
		A	162.159.44.179^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kianchau.ns.cloudflare.com`
		A	172.64.35.179^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`kianchau.ns.cloudflare.com`
NS	`maeve.ns.cloudflare.com`
		A	2606:4700:50::a29f:262d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`maeve.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c22d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`maeve.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:222d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`maeve.ns.cloudflare.com`
		A	108.162.194.45^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`maeve.ns.cloudflare.com`
		A	162.159.38.45^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`maeve.ns.cloudflare.com`
		A	172.64.34.45^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`maeve.ns.cloudflare.com`
MX	`mail.vas-hosting.cz` ⭐
		A	95.168.205.159^{🇨🇿 SuperNetwork95.168.192.0/19 s.r.o.}
TXT	`v=spf1 a mx ?all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.15.122, 172.67.162.153
		IPv6	2606:4700:3030::ac43:a299, 2606:4700:3034::6815:f7a
SOA	`kianchau.ns.cloudflare.com`dns@cloudflare.com serial=2397126371

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐ 🔒
	NS	`b.ns.nic.cz` 🔒
	NS	`c.ns.nic.cz` 🔒
	NS	`d.ns.nic.cz` 🔒
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1771291036

Same first word

13.co.za

13.at

13.wf

13.fyi

13.sb

13.ma

13.kz

13.com

13.gold

13.org

13.wtf

13.lt

13.cn

13.nl

13.in-addr.arpa

13.gr

13.cz

13.today

13.im

13.com.ua

13.s3.amazonaws.com

13.no

13.world

13.com.au

13.net

13.chat

13.tools

13.su

13.cc

13.am

13.ee

13.ph

13.biz

13.yt

13.by

13.vc

13.co.uk

13.fi

13.ag

13.lc

13.net.ru

13.de

13.hk

13.ru

13.tel

13.to

13.fr

13.gg

13.io

13.dk

13.st

13.pw

13.net.au

13.media

13.cm

13.amsterdam

13.si

13.ca

13.ai

13.net.pl

13.eu

13.com.ru

13.plus

13.ae

13.cl

13.game

13.school

13.uk

13.pl

13.kg

13.com.my

13.live

13.uz

13.is

13.se

13.com.ar

13.dyndns.tv

13.vip

13.ly

Similar names

31.fyi

31.net

31.plus

31.cz

31.or.kr

31.ph

31.org

31.gs

31.fi

31.pl

31.st

31.company

31.vc

31.gold

31.nl

31.world

31.ventures

31.com

31.no

31.sb

31.hu

31.net.cn

31.io

31.club

31.to

31.com.au

31.ws

31.lv

31.app

31.wtf

31.in-addr.arpa

31.ro

31.tel

31.sk

31.ag

31.ca

31.chat

31.cl

31.hk

31.si

31.fr

31.se

31.de

31.dk

31.eu

31.kz

31.cards

31.is

31.bet

31.cn

DNS History

25 records (7 active, 18 former)

○NSamanda.ns.cloudflare.com2015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

○NSfred.ns.cloudflare.com2015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

●NSkianchau.ns.cloudflare.com2026-02-16 → 2026-03-09 · 3 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-03-09 07:07:14

●NSmaeve.ns.cloudflare.com2026-02-16 → 2026-03-09 · 3 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-03-09 07:07:14

○NSns.onebit.cz2021-11-08 → 2021-11-08 · 4 obs

○ 2017-10-10 02:40:22
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○NSns.onebit.eu2021-11-08 → 2021-11-08 · 4 obs

○ 2017-10-10 02:40:22
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○NSns.onebit.org2021-11-08 → 2021-11-08 · 4 obs

○ 2017-10-10 02:40:22
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

●MXmail.vas-hosting.cz2026-02-16 → 2026-03-09 · 3 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-03-09 07:07:14

○MXmx9.onebit.cz2015-08-14 → 2021-11-08 · 4 obs

● 2015-08-14 00:08:08
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○MXmx9.onebit.eu2015-08-14 → 2021-11-08 · 4 obs

● 2015-08-14 00:08:08
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○MXmx9.onebit.org2015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

●A104.21.15.1222026-02-22 → 2026-03-09 · 6 obs

○ 2026-02-18 03:57:06
● 2026-02-22 20:50:10
● 2026-02-27 15:58:22
○ 2026-02-28 00:13:02
● 2026-03-04 17:29:44
● 2026-03-09 07:07:14

○A104.28.24.832015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

○A104.28.25.832015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

●A172.67.162.1532026-02-22 → 2026-03-09 · 6 obs

○ 2026-02-18 03:57:06
● 2026-02-22 20:50:10
● 2026-02-27 15:58:22
○ 2026-02-28 00:13:02
● 2026-03-04 17:29:44
● 2026-03-09 07:07:14

○A178.238.37.2412021-11-08 → 2021-11-08 · 4 obs

○ 2017-10-10 02:40:22
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○A188.114.96.02026-02-16 → 2026-02-28 · 8 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-02-18 03:57:06
○ 2026-02-22 20:50:10
○ 2026-02-27 15:58:22
● 2026-02-28 00:13:02
○ 2026-03-04 17:29:44
○ 2026-03-09 07:07:14

○A188.114.97.02026-02-16 → 2026-02-28 · 8 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-02-18 03:57:06
○ 2026-02-22 20:50:10
○ 2026-02-27 15:58:22
● 2026-02-28 00:13:02
○ 2026-03-04 17:29:44
○ 2026-03-09 07:07:14

○A2400:cb00:2048:1::681c:18532015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

○A2400:cb00:2048:1::681c:19532015-08-14 → 2017-10-10 · 4 obs

● 2015-08-14 00:08:08
● 2017-10-10 02:40:22
○ 2021-11-08 00:20:58
○ 2026-03-09 07:07:14

●A2606:4700:3030::ac43:a2992026-02-22 → 2026-03-09 · 6 obs

○ 2026-02-18 03:57:06
● 2026-02-22 20:50:10
● 2026-02-27 15:58:22
○ 2026-02-28 00:13:02
● 2026-03-04 17:29:44
● 2026-03-09 07:07:14

●A2606:4700:3034::6815:f7a2026-02-22 → 2026-03-09 · 6 obs

○ 2026-02-18 03:57:06
● 2026-02-22 20:50:10
● 2026-02-27 15:58:22
○ 2026-02-28 00:13:02
● 2026-03-04 17:29:44
● 2026-03-09 07:07:14

○A2a01:430:13::2412021-11-08 → 2021-11-08 · 4 obs

○ 2017-10-10 02:40:22
● 2021-11-08 00:20:58
○ 2026-02-16 14:49:54
○ 2026-03-09 07:07:14

○A2a06:98c1:3120::2026-02-16 → 2026-02-28 · 8 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-02-18 03:57:06
○ 2026-02-22 20:50:10
○ 2026-02-27 15:58:22
● 2026-02-28 00:13:02
○ 2026-03-04 17:29:44
○ 2026-03-09 07:07:14

○A2a06:98c1:3121::2026-02-16 → 2026-02-28 · 8 obs

○ 2021-11-08 00:20:58
● 2026-02-16 14:49:54
● 2026-02-18 03:57:06
○ 2026-02-22 20:50:10
○ 2026-02-27 15:58:22
● 2026-02-28 00:13:02
○ 2026-03-04 17:29:44
○ 2026-03-09 07:07:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	8 records
13.cz	maeve.ns.cloudflare.com, kianchau.ns.cloudflare.com	-

✅ Authoritative Response

Server: 162.159.44.179

NS records: maeve.ns.cloudflare.com, kianchau.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 13.cz (unsigned zone)

⏱️ Timing

Total: 1026ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`172.64.80.1`
AAAA	1	`2606:4700:130:436c:6f75:6466:6c61:7265`
NS	2	`kianchau.ns.cloudflare.com, maeve.ns.cloudflare.com`
MX	1	`mail.vas-hosting.cz (pri: 10)`
TXT	1	`v=spf1 a mx ?all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`kianchau.ns.cloudflare.com dns.cloudflar`

📌 Glue Records Collected

Total: 8

In-bailiwick: 8 (a.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz...)

Analysis

IP Addresses

13.cz points to four IP numbers: 2606:4700:3030::ac43:a299, 2606:4700:3034::6815:f7a, 104.21.15.122 and 172.67.162.153.

Other host names including youbixi.cn, carsinpedia.com, mail.pc-kurs.ru, www.fmsa.net and www.somoshermanos.mx share IP numbers with 13.cz.

Name Servers

13.cz's delegation uses two name servers, kianchau.ns.cloudflare.com and maeve.ns.cloudflare.com.

13.cz shares the same name server setup as other domains, for example jetl.io, longmian.com, w3hubs.com, pseudosoft.net and ebotix.org.

13.cz at least partially shares name servers with other domains, including neurotechs.com.br, projectiletube.com, ebay-verification.pages.dev, he40.com and ticdosquebradas.gov.co.

These name servers are commonly used with val.ns.cloudflare.com and mia.ns.cloudflare.com.

Host names with six IP numbers:

kianchau.ns.cloudflare.com points to: 2606:4700:58::a29f:2cb3, 2803:f800:50::6ca2:c3b3, 2a06:98c1:50::ac40:23b3, 108.162.195.179, 162.159.44.179 and 172.64.35.179.

maeve.ns.cloudflare.com points to: 2606:4700:50::a29f:262d, 2803:f800:50::6ca2:c22d, 2a06:98c1:50::ac40:222d, 108.162.194.45, 162.159.38.45 and 172.64.34.45.

Mail Servers

13.cz is handled by a single mail server, mail.vas-hosting.cz.

13.cz shares its mail server setup with other domains, including mija.name, ekoproud.eu, sanbon.cz, rockaudio.cz and tescan3dim.com.

13.cz shares some mail servers with other domains, at least partially, for instance cparity-production.com.

mail.vas-hosting.cz points to a single IP: 95.168.205.159.

13.cz - robtex.com

13.cz

cz

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`13.cz`

`cz`