`efk.cz`

DNSSEC	⚠️ Not signed
A	77.78.104.3^{🇨🇿 CASABLANCA-AS77.78.96.0/20 Casablanca INT}
		PTR	`yurika.gransy.com`
NS	`ns2.gransy.com` ⭐
		A	2001:19f0:6801:474:5400:1ff:fec5:8efb^{🇫🇷 AS-VULTR2001:19f0:6800::/38 Vultr Assigned Prefix}
		A	2001:19f0:7401:81e0:5400:1ff:fec5:8ef6^{🇬🇧 AS-VULTR2001:19f0:7400::/38 Vultr Assigned Prefix}
		A	95.179.192.121^{🇬🇧 AS-VULTR95.179.192.0/20 Vultr Assigned Prefix}
			PTR	`95.179.192.121.vultrusercontent.com`
		A	217.16.185.221^{🇨🇿 VSHOSTING217.16.176.0/20 III.}
			PTR	`ns2.gransy.com`
		A	217.69.4.49^{🇫🇷 AS-VULTR217.69.0.0/20 Vultr Assigned Prefix}
			PTR	`217.69.4.49.vultrusercontent.com`
NS	`ns.gransy.com`
		A	2001:19f0:5001:1caf:5400:1ff:fec5:8d50^{🇳🇱 AS-VULTR2001:19f0:5000::/38 Vultr Assigned Prefix}
		A	45.76.90.43^{🇩🇪 AS-VULTR45.76.80.0/20 Vultr Assigned Prefix}
			PTR	`45.76.90.43.vultrusercontent.com`
		A	77.78.104.149^{🇨🇿 CASABLANCA-AS77.78.96.0/20 Casablanca INT}
			PTR	`ns.gransy.com`
		A	95.179.136.180^{🇳🇱 AS-VULTR95.179.128.0/20 Vultr Assigned Prefix}
			PTR	`95.179.136.180.vultrusercontent.com`
NS	`ns3.gransy.com`
		A	2a02:750:7::2e7^{🇸🇪 GLESYS2a02:750::/29}
			PTR	`2a02-750-7--2e7-static.glesys.net`
		A	2a02:750:8::32^{🇳🇱 GLESYS2a02:750:8::/48 GleSYS AB}
			PTR	`2a02-750-8--32-static.glesys.net`
		A	46.21.100.103^{🇳🇱 GLESYS46.21.100.0/24 GleSYS AB}
			PTR	`46-21-100-103-static.glesys.net`
		A	77.78.126.35^{🇨🇿 CASABLANCA-AS77.78.124.0/22 Casablanca INT}
		A	109.74.7.71^{🇸🇪 GLESYS109.74.0.0/20}
			PTR	`109-74-7-71-static.glesys.net`
NS	`ns4.gransy.com`
		A	2001:19f0:5401:69b:5400:1ff:fec5:8f3f^{🇺🇸 AS-VULTR2001:19f0:5400::/38 Vultr Assigned Prefix}
		A	2a00:1a28:2010:1::89^{🇳🇴 GLESYS2a00:1a28::/32 Portlane Network}
			PTR	`2a00-1a28-2010-1--89-static.glesys.net`
		A	66.42.94.136^{🇺🇸 AS-VULTR66.42.80.0/20 Vultr Assigned Prefix}
			PTR	`66.42.94.136.vultrusercontent.com`
		A	80.67.7.209^{🇳🇴 GLESYS80.67.0.0/20 Portlane Network}
			PTR	`80-67-7-209-static.glesys.net`
NS	`ns5.gransy.com`
		A	2a02:750:5::538^{🇸🇪 GLESYS2a02:750::/29}
			PTR	`2a02-750-5--538-static.glesys.net`
		A	31.192.227.223^{🇸🇪 GLESYS31.192.224.0/21}
			PTR	`31-192-227-223-static.glesys.net`
MX	`mail.efk.cz` ⭐
TXT	`v=spf1 a mx include:gransy.com`
SOA	`ns.gransy.com`root@gransy.com serial=2783280945

`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=1784873842

Subdomains

mail.efk.cz

www.efk.cz

Same first word

efk.eu

efk.jp

efk.co.ke

efk.at

efk.in

efk.pl

efk.hu

efk.org

efk.com.pl

efk.com

efk.de

efk.dk

efk.info

efk.ru

efk.edu.mo

efk.co.jp

efk.me

efk.se

efk.ch

efk.be

efk.ro

efk.nu

efk.fr

efk.us

efk.ca

efk.cz

Similar names

fek.com.au

kef.by

ekf.cz

fek.ru

fke.in

kef.co.kr

kef.ch

ekf.cc

kef.ca

fke.de

fke.info

ekf.nl

fke.ch

kef.de

kfe.biz

kef.gr

fek.com

kfe.fr

kef.or.kr

ekf.co

kef.co.uk

kef.net

kfe.ru

ekf.se

fek.su

kef.no

ekf.info

fek.hu

fke.no

ekf.name

fke.lt

kef.be

fke.org

ekf.su

fke.be

kfe.se

kef.at

fek.ca

fke.com

kef.org.pk

ekf.gr

kef.co.in

kfe.nl

kef.pl

fke.ee

ekf.com.br

kef.com

kfe.no

fek.lt

kef.me

fek.co.kr

fke.se

fek.jp

kfe.team

kfe.it

fek.es

ekf.mobi

fek.nl

kef.jp

ekf.it

kfe.com.cn

fke.nl

kef.bg

kfe.at

kfe.com.au

ekf.com.es

kef.org

ekf.de

fek.wtf

fek.se

kef.hu

fek.cn

kef.finance

fke.mobi

fek.onl

kfe.re.kr

kfe.eu

fke.es

ekf.es

kfe.org

ekf.nu

kef.com.gr

fke.me

kef.co.il

kef.a.se

DNS History

14 records (7 active, 7 former)

○NSns.fortion.cz2015-08-01 → 2016-12-20 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

○NSns.fortion.net2015-08-01 → 2016-12-20 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

●NSns.gransy.com2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

●NSns2.gransy.com2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

●NSns3.gransy.com2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

●NSns4.gransy.com2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

●NSns5.gransy.com2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

●MXmail.efk.cz2026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

○MXmx0.fortion.net2015-08-01 → 2016-12-20 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

○MXmx1.fortion.net2015-08-01 → 2016-12-20 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

○MXmx2.fortion.net2015-08-01 → 2016-12-20 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

○A185.175.85.422016-12-14 → 2016-12-20 · 5 obs

○ 2016-08-23 01:10:18
● 2016-12-14 09:43:48
● 2016-12-20 02:40:42
○ 2026-07-01 21:08:10
○ 2026-07-24 06:47:20

●A77.78.104.32026-07-01 → 2026-07-24 · 3 obs

○ 2016-12-20 02:40:42
● 2026-07-01 21:08:10
● 2026-07-24 06:47:20

○A89.185.233.2422015-08-01 → 2016-08-23 · 5 obs

○ 2008-03-27 00:43:10
● 2015-08-01 13:15:12
● 2016-08-23 01:10:18
○ 2016-12-14 09:43:48
○ 2026-07-24 06:47:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
efk.cz	ns.gransy.com, ns2.gransy.com, ns3.gransy.com, ns4.gransy.com...	-

✅ Authoritative Response

Server:31.192.227.223

NS records: ns.gransy.com, ns2.gransy.com, ns3.gransy.com, ns4.gransy.com, ns5.gransy.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for efk.cz (unsigned zone)

⏱️ Timing

Total: 1304ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`77.78.104.3`
NS	5	`ns4.gransy.com, ns.gransy.com...`
MX	1	`mail.efk.cz (pri: 10)`
TXT	1	`v=spf1 a mx include:gransy.com`
SOA	1	`ns.gransy.com root.gransy.com`

Analysis

Hierarchy

efk.cz serves as the parent of mail.efk.cz and www.efk.cz.

IP Addresses

efk.cz has exactly one IP address — 77.78.104.3.

rtf-manual.cz, cinemamagazine.cz, pragueconspiracy.cz plus two other host names have IP numbers in common with efk.cz.

Name Servers

Five name servers handle delegation for efk.cz: ns2.gransy.com, ns3.gransy.com, ns4.gransy.com and two others.

efk.cz has at least partial name server overlap with other domains, such as (0x736578)-link.cz, dankateam.cz, appa.cz and two others.

These name servers tend to appear together with the name servers ns.gransy.com, ns5.gransy.com and ns.internetserver.cz, plus two others.

Hosts with five IP addresses:

ns2.gransy.com has IP addresses 95.179.192.121, 217.16.185.221 and 217.69.4.49 along with two other addresses.

ns3.gransy.com has IP addresses 46.21.100.103, 77.78.126.35 and 109.74.7.71 along with two other addresses.

Host names with four IP addresses:

ns4.gransy.com has four IP addresses: 66.42.94.136, 80.67.7.209, 2001:19f0:5401:69b:5400:1ff:fec5:8f3f and 2a00:1a28:2010:1::89.

ns.gransy.com has four IP addresses: 45.76.90.43, 77.78.104.149, 95.179.136.180 and 2001:19f0:5001:1caf:5400:1ff:fec5:8d50.

Host names pointing to two IP addresses:

ns5.gransy.com resolves to 31.192.227.223 and 2a02:750:5::538.

Mail Servers

efk.cz uses one mail server — mail.efk.cz.

efk.cz - robtex.com

efk.cz

cz

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

`efk.cz`

`cz`