`yfu.sk`

DNSSEC	🔒 Signed (DS record present)
A	2a00:4b40:aaaa:2011::6^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
A	37.9.175.213^{🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24}
NS	`ns1.websupport.cz` ⭐
		A	2a10:bbc0::11^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns1.websupport.eu`
		A	45.10.97.11^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns1.websupport.eu`
NS	`ns2.websupport.cz`
		A	2a02:250:3::12^{🇸🇪 ACTIVE24-AS2a02:250:3::/48}
			PTR	`ns2.websupport.eu`
		A	185.71.159.12^{🇸🇪 ACTIVE24-AS185.71.159.0/24}
			PTR	`ns2.websupport.eu`
NS	`ns3.websupport.eu`
		A	2a10:bbc0::13^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns3.websupport.eu`
		A	45.10.97.13^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns3.websupport.eu`
MX	`mx10.active24.cz` ⭐
		A	2a00:4b40:aaaa:2101:45:13:137:85^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		A	45.13.137.85^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx10.active24.cz`
MX	`mx20.active24.cz`⁽¹⁰⁰⁾
		A	2a00:4b40:aaaa:2101:45:13:137:86^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		A	45.13.137.86^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx20.active24.cz`
TXT	`v=spf1 a mx include:_spf.websupport.cz -all`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1758706568

`sk`

	DNSSEC	🔒 Signed (DS record present)
	NS	`m.tld.sk` ⭐
	NS	`e.tld.sk`
	NS	`f.tld.sk`
	NS	`g.tld.sk`
	NS	`h.tld.sk`
	SOA	`m.tld.sk`hostmaster@sk-nic.sk serial=2018504398

Subdomains

mail.yfu.sk

Same first word

yfu.com.au

yfu.nl

yfu.cl

yfu.org

yfu.fr

yfu.no

yfu.de

yfu.org.py

yfu.at

yfu.us

yfu.cz

yfu.or.jp

yfu.mn

yfu.net

yfu.cn

yfu.fi

yfu.ee

yfu.net.cn

yfu.hu

yfu.me

yfu.se

yfu.sk

yfu.world

yfu.academy

yfu.org.ar

yfu.be

yfu.or.id

yfu.dk

yfu.in

yfu.bg

yfu.org.ec

yfu.ch

yfu.com.cn

Similar names

uyf.or.kr

fuy.com

fuy.org

ufy.co.uk

fyu.fr

yuf.org

ufy.de

fuy.ru

ufy.fi

fyu.in

ufy.cn

fuy.nl

fuy.ca

fuy.edu.ye

ufy.com.ua

yuf.fr

yuf.de

fuy.co

ufy.com

ufy.org

fuy.cc

yuf.be

ufy.ru

fuy.de

fyu.com.br

uyf.org

fuy.be

yuf.in

fyu.ca

fuy.cz

fyu.nl

ufy.net

fyu.org

yuf.co

fyu.net

fyu.de

fyu.se

yuf.ru

ufy.eu

fuy.ch

uyf.in

fyu.be

fuy.cn

ufy.it

yuf.com

fyu.com

fyu.cn

fyu.us

uyf.ru

fuy.in

ufy.ca

fyu.jp

fyu.com.cn

yuf.net

fyu.la

fyu.co

fuy.fr

DNS History

20 records (7 active, 13 former)

○NSns.yfu.sk2015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

○NSns1.first-ns.de2015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

●NSns1.websupport.cz2026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

○NSns1.websupport.sk2016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

●NSns2.websupport.cz2026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

○NSns2.websupport.sk2016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

●NSns3.websupport.eu2026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

○NSns3.websupport.sk2016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

○NSrobotns2.second-ns.de2015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

○NSrobotns3.second-ns.com2015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

○MXmail.yfu.sk2015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

○MXmailin1.yfu.sk2016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

○MXmailin2.yfu.sk2016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

○MXmailinbackup1.yfu.sk2016-02-26 → 2016-04-27 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-04-27 13:25:10
○ 2016-08-24 20:31:32
○ 2026-04-13 19:54:48

●MXmx10.active24.cz2026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

●MXmx20.active24.cz2026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

○A176.9.149.1432015-08-02 → 2015-11-28 · 4 obs

● 2015-08-02 05:00:46
● 2015-11-28 23:37:12
○ 2016-02-26 08:16:46
○ 2026-04-13 19:54:48

●A2a00:4b40:aaaa:2011::62026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

●A37.9.175.2132026-02-25 → 2026-04-13 · 3 obs

○ 2016-12-23 07:07:22
● 2026-02-25 11:54:26
● 2026-04-13 19:54:48

○A37.9.175.82016-02-26 → 2016-12-23 · 5 obs

○ 2015-11-28 23:37:12
● 2016-02-26 08:16:46
● 2016-12-23 07:07:22
○ 2026-02-25 11:54:26
○ 2026-04-13 19:54:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
sk	e.tld.sk, f.tld.sk, g.tld.sk, h.tld.sk	-
yfu.sk	ns3.websupport.eu, ns1.websupport.cz, ns2.websupport.cz	-

✅ Authoritative Response

Server:45.10.97.11

NS records: ns3.websupport.eu, ns1.websupport.cz, ns2.websupport.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 588ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.9.175.213`
AAAA	1	`2a00:4b40:aaaa:2011::6`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	2	`mx10.active24.cz (pri: 10), mx20.active24.cz (pri: 100)`
TXT	1	`v=spf1 a mx include:_spf.websupport.cz -`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

Analysis

Hierarchy

yfu.sk is the parent of mail.yfu.sk.

IP Addresses

yfu.sk resolves to two IPs: 2a00:4b40:aaaa:2011::6 and 37.9.175.213.

other host names for instance www.2o.cz, empleo.sk, doceo.cz, silkland.eu and www.pfa-service.cz share IP numbers with yfu.sk.

Name Servers

yfu.sk is delegated to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.

yfu.sk at least partially shares name servers with other domains, for instance kydlinov.cz, vlocka.eu, lote-bezky.cz, mikrona.cz and marinadavle.cz.

These name servers are commonly used with ns1.websupport.sk, ns2.websupport.sk and ns3.websupport.sk.

Host names with two IP numbers:

Host ns1.websupport.cz points to 2a10:bbc0::11 and 45.10.97.11.

Host ns2.websupport.cz points to 2a02:250:3::12 and 185.71.159.12.

Host ns3.websupport.eu points to 2a10:bbc0::13 and 45.10.97.13.

Mail Servers

yfu.sk is handled by two mail servers: mx10.active24.cz and mx20.active24.cz.

yfu.sk shares the same mail server setup as other domains, for instance bugsysbar.com, emiq.de, sychra.com, holley.cz and phenomeno.cz.

yfu.sk shares some mail servers with other domains at least partially, for example goldo.cz.

Host names with two IP numbers:

mx10.active24.cz points to 2a00:4b40:aaaa:2101:45:13:137:85 and 45.13.137.85

mx20.active24.cz points to 2a00:4b40:aaaa:2101:45:13:137:86 and 45.13.137.86

yfu.sk - robtex.com

yfu.sk

sk

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`yfu.sk`

`sk`