`jaroslavsimon.cz`

DNSSEC	🔒 Signed (DS record present)
A	2a00:4b40:aaaa:2005::7^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
A	37.9.175.163^{🇸🇰 WEBSUPPORT-SRO-SK-AS37.9.175.0/24}
NS	`ns1.websupport.cz` ⭐
		A	2a10:bbc0::11^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns1.websupport.eu`
		A	45.10.97.11^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns1.websupport.eu`
NS	`ns2.websupport.cz`
		A	2a02:250:3::12^{🇸🇪 ACTIVE24-AS2a02:250:3::/48}
			PTR	`ns2.websupport.eu`
		A	185.71.159.12^{🇸🇪 ACTIVE24-AS185.71.159.0/24}
			PTR	`ns2.websupport.eu`
NS	`ns3.websupport.eu`
		A	2a10:bbc0::13^{🇨🇿 ACTIVE24-AS2a10:bbc0::/32}
			PTR	`ns3.websupport.eu`
		A	45.10.97.13^{🇨🇿 ACTIVE24-AS45.10.97.0/24}
			PTR	`ns3.websupport.eu`
MX	`mailin1.jaroslavsimon.cz` ⭐
		A	2a00:4b40:aaaa:2101:45:13:137:105^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
		A	45.13.137.113^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`m1-u6-mx.websupport.hu`
MX	`mailin2.jaroslavsimon.cz`⁽¹⁰⁰⁾
		A	2a00:4b40:aaaa:2101:45:13:137:9^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
			PTR	`m1-u7-mx.websupport.sk`
		A	45.13.137.7^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx10.websupport.at`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1736033089

`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=1784836040

Subdomains

mailin2.jaroslavsimon.cz

mailin1.jaroslavsimon.cz

Same first word

jaroslavsimon.cz

DNS History

14 records (7 active, 7 former)

○NSalfa.ns.active24.cz2019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

○NSbeta.ns.active24.cz2019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

○NSgama.ns.active24.sk2019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

●NSns1.websupport.cz2026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

●NSns2.websupport.cz2026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

●NSns3.websupport.eu2026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

●MXmailin1.jaroslavsimon.cz2026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

●MXmailin2.jaroslavsimon.cz2026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

○MXmx1.active24.com2019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

○MXmx2.active24.com2019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

●A2a00:4b40:aaaa:2005::72026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

○A2a02:4a8:ac24:110::10:482019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

○A31.15.10.482019-03-04 → 2019-03-04 · 3 obs

● 2019-03-04 07:40:10
○ 2026-04-06 02:09:26
○ 2026-07-23 19:56:18

●A37.9.175.1632026-04-06 → 2026-07-23 · 3 obs

○ 2019-03-04 07:40:10
● 2026-04-06 02:09:26
● 2026-07-23 19:56:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
jaroslavsimon.cz	ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu	-

✅ Authoritative Response

Server:45.10.97.13

NS records: ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 955ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.9.175.163`
AAAA	1	`2a00:4b40:aaaa:2005::7`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	2	`mailin1.jaroslavsimon.cz (pri: 10), mailin2.jaroslavsimon.cz (pri: 100)`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

Analysis

Hierarchy

The parent domain of mailin2.jaroslavsimon.cz and mailin1.jaroslavsimon.cz is jaroslavsimon.cz.

IP Addresses

jaroslavsimon.cz directs to two IP numbers, 37.9.175.163 and 2a00:4b40:aaaa:2005::7

Among the host names that share IP numbers with jaroslavsimon.cz are perseus.cz, rensing.nl, equabank.at and two others.

Name Servers

The authoritative name servers for jaroslavsimon.cz are ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu — three in total.

jaroslavsimon.cz shares at least some of its name servers with other domains, including rekam.cz, kwon.sk, fishmaker.info and two others.

ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu all resolve to exactly two IP numbers apiece: ns1.websupport.cz → 45.10.97.11 and 2a10:bbc0::11; ns2.websupport.cz → 185.71.159.12 and 2a02:250:3::12; ns3.websupport.eu → 45.10.97.13 and 2a10:bbc0::13.

Mail Servers

The MX records for jaroslavsimon.cz point to two mail servers: mailin1.jaroslavsimon.cz and mailin2.jaroslavsimon.cz.

The two host names mailin1.jaroslavsimon.cz and mailin2.jaroslavsimon.cz each have a pair of IP addresses: mailin1.jaroslavsimon.cz has 45.13.137.113 and 2a00:4b40:aaaa:2101:45:13:137:105, and mailin2.jaroslavsimon.cz has 45.13.137.7 and 2a00:4b40:aaaa:2101:45:13:137:9.

jaroslavsimon.cz - robtex.com