`kosicek.cz`

DNSSEC	🔒 Signed (DS record present)
A	94.23.168.180^{🇫🇷 OVH94.23.0.0/16 ISP Paris, France}
		PTR	`ip180.ip-94-23-168.eu`
NS	`ns2.web4u.cz` ⭐
		A	2a02:a40:100:28ff::12^{🇨🇿 BlueTone-AS2a02:a40::/32 Ceske Radiokomunikace, a.s.}
			PTR	`ns2.web4u.cz`
		A	85.207.53.12^{🇨🇿 BlueTone-AS85.207.0.0/16 BlueTone-CRa-CZ Fourth address block}
			PTR	`ns2.web4u.cz`
NS	`ns.web4u.cz`
		A	2001:1568:fd::241^{🇨🇿 WEB4U2001:1568::/33}
			PTR	`ns.web4u.cz`
		A	185.14.224.241^{🇨🇿 WEB4U185.14.224.0/23}
			PTR	`ns.web4u.cz`
MX	`kosicek-cz.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::4^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::7^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::8^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
		A	52.101.68.5^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du2pr03cu00105.inbound.protection.outlook.com`
		A	52.101.68.16^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00400.inbound.protection.outlook.com`
		A	52.101.68.25^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db8pr02cu00101.inbound.protection.outlook.com`
		A	52.101.73.24^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr05cu00300.inbound.protection.outlook.com`
TXT	`MS=ms59737108`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns.web4u.cz`admin@web4u.cz 2014-04-16 #1

`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=1784886442

Subdomains

mail.kosicek.cz

www.kosicek.cz

null.kosicek.cz

Same first word

kosicek.info

kosicek.com

kosicek.cz

Similar names

kosecki.pl

kosecki.de

kosecki.com

kosecik.com

kickseo.com

kosecki.com.pl

seokick.com

cokkies.com

kosecki.eu

kockies.nl

kocisek.com

DNS History

6 records (4 active, 2 former)

●NSns.web4u.cz2015-07-11 → 2026-07-24 · 2 obs

● 2015-07-11 12:27:48
● 2026-07-24 10:10:58

●NSns2.web4u.cz2015-07-11 → 2026-07-24 · 2 obs

● 2015-07-11 12:27:48
● 2026-07-24 10:10:58

●MXkosicek-cz.mail.protection.outlook.com2020-01-13 → 2026-07-24 · 3 obs

○ 2017-01-15 06:29:32
● 2020-01-13 11:14:26
● 2026-07-24 10:10:58

○MXmail.kosicek.cz2015-07-11 → 2017-01-15 · 4 obs

● 2015-07-11 12:27:48
● 2017-01-15 06:29:32
○ 2020-01-13 11:14:26
○ 2026-07-24 10:10:58

○A81.91.86.122015-07-11 → 2015-11-11 · 4 obs

● 2015-07-11 12:27:48
● 2015-11-11 00:33:12
○ 2016-02-02 15:50:50
○ 2026-07-24 10:10:58

●A94.23.168.1802016-02-02 → 2026-07-24 · 3 obs

○ 2015-11-11 00:33:12
● 2016-02-02 15:50:50
● 2026-07-24 10:10:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	d.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz	-
kosicek.cz	ns2.web4u.cz, ns.web4u.cz	4 records

✅ Authoritative Response

Server:85.207.53.12

NS records: ns2.web4u.cz, ns.web4u.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 583ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`94.23.168.180`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`kosicek-cz.mail.protection.outlook.com (`
TXT	2	`MS=ms59737108, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns.web4u.cz admin.web4u.cz`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns2.web4u.cz, ns.web4u.cz, ns2.web4u.cz...)

Analysis

Hierarchy

kosicek.cz is a parent domain, with mail.kosicek.cz, www.kosicek.cz and null.kosicek.cz beneath it.

IP Addresses

kosicek.cz resolves to just one IP address, 94.23.168.180.

Two other host names, along with kolacny.eu, jmkapa.com and ip180.ip-94-23-168.eu, also share IP numbers with kosicek.cz.

Name Servers

kosicek.cz has two authoritative name servers — ns2.web4u.cz and ns.web4u.cz.

kosicek.cz shares its NS records with other domains, for example enersis.cz, irfc.eu, roklen24.cz and two others.

Both ns2.web4u.cz and ns.web4u.cz have two IP addresses each. ns2.web4u.cz resolves to 85.207.53.12 and 2a02:a40:100:28ff::12; ns.web4u.cz resolves to 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

The sole mail server for kosicek.cz is kosicek-cz.mail.protection.outlook.com.

With 8 IP addresses total, kosicek-cz.mail.protection.outlook.com resolves to 52.101.68.5, 52.101.68.16, 52.101.68.25 and 5 others.

kosicek.cz - robtex.com

kosicek.cz

cz