`klara-markova.com`

DNSSEC	⚠️ Not signed
A	81.91.86.13^{🇨🇿 WEB4U81.91.80.0/21}
		PTR	`php56.web4u.cz`
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	`mx1.mailchannels.net` ⭐
		A	54.69.1.140^{🇺🇸 Amazon54.68.0.0/15 EC2 PDX Prefix}
			PTR	`ec2-54-69-1-140.us-west-2.compute.amazonaws.com`
MX	`mx2.mailchannels.net` ⭐
		A	18.236.29.166^{🇺🇸 Amazon18.236.0.0/15 EC2 PDX prefix}
			PTR	`ec2-18-236-29-166.us-west-2.compute.amazonaws.com`
SOA	`ns.web4u.cz`admin@web4u.cz 2025-05-03 #0

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1776053067

Same first word

klara-markova.com

DNS History

9 records (5 active, 4 former)

●NSns.web4u.cz2015-08-07 → 2026-04-13 · 2 obs

● 2015-08-07 20:38:24
● 2026-04-13 04:20:16

●NSns2.web4u.cz2015-08-07 → 2026-04-13 · 2 obs

● 2015-08-07 20:38:24
● 2026-04-13 04:20:16

○MXmail.klara-markova.com2015-08-07 → 2017-02-06 · 4 obs

● 2015-08-07 20:38:24
● 2017-02-06 06:41:40
○ 2020-03-01 10:41:36
○ 2026-04-13 04:20:16

○MXmx.web4u.cz2020-03-01 → 2020-03-01 · 4 obs

○ 2017-02-06 06:41:40
● 2020-03-01 10:41:36
○ 2026-02-14 20:18:10
○ 2026-04-13 04:20:16

●MXmx1.mailchannels.net2026-02-14 → 2026-04-13 · 3 obs

○ 2020-03-01 10:41:36
● 2026-02-14 20:18:10
● 2026-04-13 04:20:16

●MXmx2.mailchannels.net2026-02-14 → 2026-04-13 · 3 obs

○ 2020-03-01 10:41:36
● 2026-02-14 20:18:10
● 2026-04-13 04:20:16

○A81.0.206.1162015-12-01 → 2017-02-06 · 5 obs

○ 2015-08-07 20:38:24
● 2015-12-01 15:16:34
● 2017-02-06 06:41:40
○ 2020-03-01 10:41:36
○ 2026-04-13 04:20:16

○A81.91.86.122015-08-07 → 2015-08-07 · 3 obs

● 2015-08-07 20:38:24
○ 2015-12-01 15:16:34
○ 2026-04-13 04:20:16

●A81.91.86.132020-03-01 → 2026-04-13 · 3 obs

○ 2017-02-06 06:41:40
● 2020-03-01 10:41:36
● 2026-04-13 04:20:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, f.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net...	-
klara-markova.com	ns.web4u.cz, ns2.web4u.cz	-

✅ Authoritative Response

Server:185.14.224.241

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for klara-markova.com (unsigned zone)

⏱️ Timing

Total: 817ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.91.86.13`
NS	2	`ns.web4u.cz, ns2.web4u.cz`
MX	2	`mx1.mailchannels.net (pri: 10), mx2.mailchannels.net (pri: 10)`
SOA	1	`ns.web4u.cz admin.web4u.cz`

Analysis

IP Addresses

klara-markova.com resolves to a single IP: 81.91.86.13.

Other host names, for instance czechfinance.eu, usbkram.com, rkservis.com, replays.cz and drytrees.com share IP numbers with klara-markova.com.

Name Servers

klara-markova.com has two name servers: ns2.web4u.cz and ns.web4u.cz.

klara-markova.com shares the same name server setup as other domains, for example sterilizatory.cz, dolujeme.eu, fisporent.sk, flexidata.cz and delex.cz.

Host names with two IP numbers:

ns2.web4u.cz points to: 2a02:a40:100:28ff::12 and 85.207.53.12; ns.web4u.cz points to: 2001:1568:fd::241 and 185.14.224.241.

Mail Servers

klara-markova.com is served by two mail servers: mx1.mailchannels.net and mx2.mailchannels.net.

klara-markova.com shares the mail server setup with other domains, for example outofhouse.agency, infinitosmundos.com, mail.mudron.net, shuion-arts.com and customglassware.com.

klara-markova.com shares some mail servers with other domains at least partially, for instance aimek.se and ejeschokladfabrik.se.

Host names with a single IP:

mx1.mailchannels.net points to 54.69.1.140

mx2.mailchannels.net points to 18.236.29.166

klara-markova.com - robtex.com