`studyatctu.com`

DNSSEC	🔒 Signed (DS record present)
A	2a00:4b40:aaaa:2005::7^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
A	37.9.175.165^{🇸🇰 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.studyatctu.com` ⭐
		A	2a00:4b40:aaaa:2101:45:13:137:7^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
			PTR	`m1-u5-mx.websupport.sk`
		A	45.13.137.8^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`mx20.websupport.at`
MX	`mailin2.studyatctu.com`⁽¹⁰⁰⁾
		A	2a00:4b40:aaaa:2101:45:13:137:8^{🇸🇰 WEBSUPPORT-SRO-SK-AS2a00:4b40::/32}
			PTR	`m1-u6-mx.websupport.sk`
		A	45.13.137.9^{🇸🇰 WEBSUPPORT-SRO-SK-AS45.13.137.0/24}
			PTR	`m1-u7-mx.websupport.sk`
TXT	`v=spf1 include:spf.active24.com include:_spf.m1.websupport.sk ~all`
SOA	`ns1.websupport.cz`admin@websupport.cz serial=1700868139

`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=1778861646

Subdomains

mailin2.studyatctu.com

mailin1.studyatctu.com

Same first word

studyatctu.com

DNS History

19 records (7 active, 12 former)

○NSns.grdns.cz2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○NSns.grdns.it2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

●NSns1.websupport.cz2026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

●NSns2.websupport.cz2026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

●NSns3.websupport.eu2026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

○MXalt1.aspmx.l.google.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXalt2.aspmx.l.google.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXaspmx.l.google.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXaspmx2.googlemail.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXaspmx3.googlemail.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXaspmx4.googlemail.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXaspmx5.googlemail.com2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

○MXkacer.armin.sk2015-06-13 → 2017-06-07 · 4 obs

● 2015-06-13 12:22:48
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

●MXmailin1.studyatctu.com2026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

●MXmailin2.studyatctu.com2026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

○A185.32.160.252016-10-24 → 2017-06-07 · 5 obs

○ 2016-04-24 00:28:50
● 2016-10-24 14:08:14
● 2017-06-07 10:35:44
○ 2026-03-06 16:19:40
○ 2026-05-15 16:42:58

●A2a00:4b40:aaaa:2005::72026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

●A37.9.175.1652026-03-06 → 2026-05-15 · 3 obs

○ 2017-06-07 10:35:44
● 2026-03-06 16:19:40
● 2026-05-15 16:42:58

○A89.185.239.552015-06-13 → 2016-04-24 · 4 obs

● 2015-06-13 12:22:48
● 2016-04-24 00:28:50
○ 2016-10-24 14:08:14
○ 2026-05-15 16:42:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
studyatctu.com	ns1.websupport.cz, ns2.websupport.cz, ns3.websupport.eu	-

✅ Authoritative Response

Server:45.10.97.11

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: 447ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`37.9.175.165`
AAAA	1	`2a00:4b40:aaaa:2005::7`
NS	3	`ns1.websupport.cz, ns2.websupport.cz...`
MX	2	`mailin1.studyatctu.com (pri: 10), mailin2.studyatctu.com (pri: 100)`
TXT	1	`v=spf1 include:spf.active24.com include:`
SOA	1	`ns1.websupport.cz admin.websupport.cz`

Analysis

Hierarchy

studyatctu.com is a parent of mailin2.studyatctu.com and mailin1.studyatctu.com.

IP Addresses

studyatctu.com points to two IP numbers: 2a00:4b40:aaaa:2005::7 and 37.9.175.165.

Other host names such as mail.precismo.com, wiaca.org, alidemirli.com, tobigames.com and mwbizuterie.cz share IPs with studyatctu.com.

Name Servers

studyatctu.com is delegated to three name servers: ns1.websupport.cz, ns2.websupport.cz and ns3.websupport.eu.

studyatctu.com at least partially shares name servers with other domains, for example dev-fusion.eu, skolarakvice.cz, doit.cz, aek-svareci-technika.cz and mudifin.nl.