`f-mark.cz`

DNSSEC	🔒 Signed (DS record present)
A	46.28.106.218^{🇨🇿 WEDOS46.28.104.0/21 Internet, a.s.}
		PTR	`hc1-wd402.wedos.net`
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	`fmark-cz0c.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::5^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db3pr0202cu00205.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::9^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as8pr04cu00801.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::d^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr05cu01305.inbound.protection.outlook.com`
		A	52.101.68.29^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dbapr03cu00105.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
		A	52.101.73.15^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
TXT	`MS=ms30083778`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns.web4u.cz`admin@web4u.cz 2024-06-04 #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=1784155639

Same first word

f-mark.cz

Similar names

ra-fmk.de

k-farm.info

farm-k.net

mrk-af.com

ark-mf.net

DNS History

6 records (4 active, 2 former)

●NSns.web4u.cz2015-08-18 → 2026-07-16 · 2 obs

● 2015-08-18 01:18:50
● 2026-07-16 00:19:56

●NSns2.web4u.cz2015-08-18 → 2026-07-16 · 2 obs

● 2015-08-18 01:18:50
● 2026-07-16 00:19:56

●MXfmark-cz0c.mail.protection.outlook.com2020-01-02 → 2026-07-16 · 3 obs

○ 2017-01-25 06:32:44
● 2020-01-02 15:54:38
● 2026-07-16 00:19:56

○MXpop3.f-mark.cz2015-08-18 → 2017-01-25 · 4 obs

● 2015-08-18 01:18:50
● 2017-01-25 06:32:44
○ 2020-01-02 15:54:38
○ 2026-07-16 00:19:56

●A46.28.106.2182026-03-18 → 2026-07-16 · 3 obs

○ 2020-01-02 15:54:38
● 2026-03-18 19:05:52
● 2026-07-16 00:19:56

○A81.91.85.832015-08-18 → 2020-01-02 · 4 obs

● 2015-08-18 01:18:50
● 2020-01-02 15:54:38
○ 2026-03-18 19:05:52
○ 2026-07-16 00:19:56

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:185.14.224.241

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

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1164ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`46.28.106.218`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	1	`fmark-cz0c.mail.protection.outlook.com (`
TXT	2	`MS=ms30083778, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns.web4u.cz admin.web4u.cz`

📌 Glue Records Collected

Total: 4

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

Analysis

IP Addresses

f-mark.cz has exactly one IP address — 46.28.106.218.

dogana.cz, mail2.lacannelle.cz, mojeduha.cz plus two other host names have IP numbers in common with f-mark.cz.

Name Servers

Two name servers handle the delegation for f-mark.cz: ns2.web4u.cz and ns.web4u.cz.

The name server configuration of f-mark.cz is shared with other domains, for instance pactor.cz, pro-oil.cz, tour4u.eu and two others.

ns2.web4u.cz and ns.web4u.cz both carry two IP addresses. The A records for ns2.web4u.cz are 85.207.53.12 and 2a02:a40:100:28ff::12; the A records for ns.web4u.cz are 185.14.224.241 and 2001:1568:fd::241.

Mail Servers

f-mark.cz uses one mail server — fmark-cz0c.mail.protection.outlook.com.

fmark-cz0c.mail.protection.outlook.com has 8 IP addresses: 52.101.68.29, 52.101.68.39, 52.101.73.11 plus 5 more.

f-mark.cz - robtex.com

f-mark.cz

cz