`uxmasterclass.cz`

DNSSEC	⚠️ Not signed
A	91.213.160.76^{🇨🇿 MASTER-AS91.213.160.0/24 Internet Info, s.r.o.}
		PTR	`server.sherpas.cz`
NS	`ns.iinfo.cz` ⭐
		A	2001:67c:68::5^{🇨🇿 MASTER-AS2001:67c:68::/48 IINFO-1-IPV6-MAI-CZ}
			PTR	`ns.iinfo.cz`
		A	91.213.160.5^{🇨🇿 MASTER-AS91.213.160.0/24 Internet Info, s.r.o.}
			PTR	`ns.iinfo.cz`
NS	`ns6.adminit.cz`
		A	2a03:b0c0:3:d0::4c:2001^{🇩🇪 DIGITALOCEAN2a03:b0c0:3::/48 DigitalOcean}
			PTR	`ns6.adminit.cz`
		A	46.101.163.95^{🇩🇪 DIGITALOCEAN46.101.128.0/17 DigitalOcean}
			PTR	`ns6.adminit.cz`
MX	`mail12.ignum.cz` ⭐
		A	62.109.151.89^{🇨🇿 IGNUM-AS62.109.128.0/19 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
MX	`mail2.ignum.cz`⁽²⁰⁾
		A	62.109.128.119^{🇨🇿 IGNUM-AS62.109.128.0/19 Network of Ignum s.r.o. Czech Republic http://www.ignum.cz/}
			PTR	`mx-lb.core.webglobe.com`
SOA	`ns.iinfo.cz`hostmaster@iinfo.cz 2018-11-12 #99

`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=1778336236

Same first word

uxmasterclass.cz

DNS History

8 records (5 active, 3 former)

●NSns.iinfo.cz2020-02-20 → 2026-05-09 · 3 obs

○ 2017-03-13 21:59:20
● 2020-02-20 11:32:58
● 2026-05-09 14:23:24

○NSns1.ignum.com2015-08-07 → 2017-03-13 · 4 obs

● 2015-08-07 23:40:16
● 2017-03-13 21:59:20
○ 2020-02-20 11:32:58
○ 2026-05-09 14:23:24

○NSns2.ignum.cz2015-08-07 → 2017-03-13 · 4 obs

● 2015-08-07 23:40:16
● 2017-03-13 21:59:20
○ 2020-02-20 11:32:58
○ 2026-05-09 14:23:24

●NSns6.adminit.cz2020-02-20 → 2026-05-09 · 3 obs

○ 2017-03-13 21:59:20
● 2020-02-20 11:32:58
● 2026-05-09 14:23:24

●MXmail12.ignum.cz2015-08-07 → 2026-05-09 · 2 obs

● 2015-08-07 23:40:16
● 2026-05-09 14:23:24

●MXmail2.ignum.cz2015-08-07 → 2026-05-09 · 2 obs

● 2015-08-07 23:40:16
● 2026-05-09 14:23:24

○A91.213.160.1472015-08-07 → 2017-03-13 · 4 obs

● 2015-08-07 23:40:16
● 2017-03-13 21:59:20
○ 2020-02-20 11:32:58
○ 2026-05-09 14:23:24

●A91.213.160.762020-02-20 → 2026-05-09 · 3 obs

○ 2017-03-13 21:59:20
● 2020-02-20 11:32:58
● 2026-05-09 14:23:24

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	c.ns.nic.cz, a.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
uxmasterclass.cz	ns.iinfo.cz, ns6.adminit.cz	4 records

✅ Authoritative Response

Server:91.213.160.5

NS records: ns.iinfo.cz, ns6.adminit.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 787ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`91.213.160.76`
NS	2	`ns6.adminit.cz, ns.iinfo.cz`
MX	2	`mail12.ignum.cz (pri: 10), mail2.ignum.cz (pri: 20)`
SOA	1	`ns.iinfo.cz hostmaster.iinfo.cz`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns.iinfo.cz, ns.iinfo.cz, ns6.adminit.cz...)

Analysis

IP Addresses

uxmasterclass.cz points to a single IP: 91.213.160.76.

Other host names, for example jakmeritweb.cz, webvyzkum.cz, www.webvyzkum.cz and server.sherpas.cz share IP numbers with uxmasterclass.cz.

Name Servers

Two name servers ns6.adminit.cz and ns.iinfo.cz handle delegation for uxmasterclass.cz.

uxmasterclass.cz uses the same name server setup as other domains, for example noviny.cz, 160.213.91.in-addr.arpa, clipboard.cz, wirelesswednesday.cz and woko.cz.

uxmasterclass.cz partially shares name servers with other domains; examples include e(0x6d696c66)rey-select.cz, proclinux.cz, medisol.cz, dilia.eu and stahnu.cz.

These name servers are often used with the name servers ns.adminit.cz and ns2.ignum.cz.

Host names with two IP numbers:

ns6.adminit.cz points to: 2a03:b0c0:3:d0::4c:2001 and 46.101.163.95

ns.iinfo.cz points to: 2001:67c:68::5 and 91.213.160.5

Mail Servers

uxmasterclass.cz is handled by two mail servers: mail12.ignum.cz and mail2.ignum.cz.

uxmasterclass.cz has the same mail server setup as other domains, including tescomaeshop.de, volvik.cz, iqlandia.eu, uxc.cz and eurotunnel.cz.

uxmasterclass.cz shares some mail servers with other domains, at least partially, such as 17.cz, aaa-treppen.de, tech-specs.com, cgm-life.cz and mefak.com.

These mail servers are often used with mail11.ignum.cz, mail8.ignum.cz, mail5.ignum.cz and mail.ignum.cz.

Host names with one IP number: The host name mail12.ignum.cz points to 62.109.151.89 and the host name mail2.ignum.cz points to 62.109.128.119.

uxmasterclass.cz - robtex.com