`udm.cz`

DNSSEC	⚠️ Not signed
NS	`ns1.one.cz` ⚠️ Not in zone NS records
		A	2001:470:6f:864::1^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
			PTR	`ns1.one.cz`
		A	46.149.113.151^{🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o.}
			PTR	`ns1.one.cz`
NS	`ns2.one.cz` ⚠️ Not in zone NS records
		A	193.85.20.140^{🇨🇿 TMOBILE-CZ193.85.0.0/16 T-Mobile Czech Republic a.s.}
			PTR	`ns2.one.cz`
NS	`ns3.one.cz` ⚠️ Not in zone NS records
		A	2001:470:6f:30f::1:1^{🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA}
			PTR	`ns3.one.cz`
		A	46.149.113.187^{🇨🇿 ALFSERVIS-AS46.149.112.0/20 Route object 1 AlfServis s.r.o.}
			PTR	`ns3.one.cz`

`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=1781554637

Same first word

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udm.at

udm.me

udm.media

udm.market

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udm.it

udm.hr

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Similar names

dum.fr

mud.academy

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mud.it

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umd.com.ua

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mud.com.au

mud.org.za

mdu.cl

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dum.co.kr

mud.cl

dmu.sarl

mdu.edu.ua

mdu.org.br

umd.ro

mdu.kr

dmu.lt

umd.com.br

umd.nic.in

mud.kiev.ua

mud.lt

mdu.co

dmu.edu.ua

dum.no

mud.at

dmu.net

mud.su

mud.net

dum.gr

dum.my

mud.co.uk

dum.ch

umd.co.jp

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dmu.dp.ua

dum.co.uk

dmu.co.jp

mud.es

dmu.no

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dmu.com.cn

mud.hu

mud.ro

dum.ro

umd.com.au

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mud.com

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dmu.nu

mdu.ca

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dum.eu.com

mud.tw

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mdu.it

umd.cc

dum.ai

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dum.mx

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dmu.fr

mud.eu

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dmu.jp

mud.media

mud.fr

mud.school

dum.com.br

umd.org

dmu.pl

mud.kr

dmu.su

umd.ru

mud.pl

dmu.org

dum.dk

mdu.es

mdu.at

dmu.nl

mdu.pt

mdu.edu.az

mud.arq.br

DNS History

11 records (3 active, 8 former)

○NSalfa.ns.active24.cz2008-03-27 → 2015-06-14 · 4 obs

● 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○NSbeta.ns.active24.cz2008-03-27 → 2015-06-14 · 4 obs

● 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○NSgama.ns.active24.sk2015-06-14 → 2015-06-14 · 4 obs

○ 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

●NSns1.one.cz2026-06-14 → 2026-06-15 · 3 obs

○ 2015-10-20 21:40:42
● 2026-06-14 17:32:54
● 2026-06-15 20:54:48

●NSns2.one.cz2026-06-14 → 2026-06-15 · 3 obs

○ 2015-10-20 21:40:42
● 2026-06-14 17:32:54
● 2026-06-15 20:54:48

●NSns3.one.cz2026-06-14 → 2026-06-15 · 3 obs

○ 2015-10-20 21:40:42
● 2026-06-14 17:32:54
● 2026-06-15 20:54:48

○MXin.smtp.cz2008-03-27 → 2015-06-14 · 4 obs

● 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○MXmx.smtp.cz2008-03-27 → 2015-06-14 · 4 obs

● 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○A2a02:4a8:ac24:108::96:1532015-06-14 → 2015-06-14 · 4 obs

○ 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○A81.95.96.1532015-06-14 → 2015-06-14 · 4 obs

○ 2008-03-27 05:06:22
● 2015-06-14 11:18:56
○ 2015-10-20 21:40:42
○ 2026-06-15 20:54:48

○A81.95.96.1602008-03-27 → 2008-03-27 · 3 obs

● 2008-03-27 05:06:22
○ 2015-06-14 11:18:56
○ 2026-06-15 20:54:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
udm.cz	ns1.one.cz, ns2.one.cz, ns3.one.cz	5 records

✅ Authoritative Response

Server:46.149.113.151

NS records: ns1.one.cz, ns2.one.cz, ns3.one.cz

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

No DNSKEY for udm.cz

⏱️ Timing

Total: 913ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 5

Out-of-bailiwick: 5 (ns1.one.cz, ns1.one.cz, ns2.one.cz...)

Analysis

Name Servers

udm.cz is served by three name servers: ns1.one.cz, ns2.one.cz and ns3.one.cz.

At least some of udm.cz's name servers are shared with other domains, for example rkc.cz, ft.cz, nowy.cz and two more.

Hostnames that resolve to two IP addresses:

The A records for ns1.one.cz return 46.149.113.151 and 2001:470:6f:864::1.

The A records for ns3.one.cz return 46.149.113.187 and 2001:470:6f:30f::1:1.

Hosts with just one IP address:

ns2.one.cz resolves to the IP address 193.85.20.140.

udm.cz - robtex.com

udm.cz

cz

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Name Servers

`udm.cz`

`cz`