`jt-computer.at`

DNSSEC	⚠️ Not signed
NS	`dns1.a1.net` ⭐
		A	2001:850:3030:31:80:120:17:26^{🇦🇹 A1TELEKOM-AT2001:850::/29 A1 Telekom Austria AG}
			PTR	`dns1.a1.net`
		A	80.120.17.26^{🇦🇹 A1TELEKOM-AT80.120.0.0/14 HIGHWAY194}
			PTR	`dns1.a1.net`
NS	`dns2.a1.net`
		A	2001:67c:1bc::105^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD2001:67c:1bc::/48 IPCom-NET Anycast}
			PTR	`dns2.a1.net`
		A	2001:850:3010:101:213:33:99:79^{🇦🇹 A1TELEKOM-AT2001:850::/29 A1 Telekom Austria AG}
			PTR	`dns2.a1.net`
		A	192.174.68.105^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD192.174.68.0/24 NICat-anycast-net}
			PTR	`dns2.a1.net`
		A	213.33.99.79^{🇦🇹 A1TELEKOM-AT213.33.0.0/17 A1 Telekom Austria AG}
			PTR	`dns2.a1.net`
NS	`dns3.a1.net`
		A	2001:67c:10b8::105^{🇨🇭 RCODEZERO-ANYCAST-SEC22001:67c:10b8::/48 IPCOM-anycast-net}
			PTR	`dns3.a1.net`
		A	176.97.158.105^{🇦🇹 RCODEZERO-ANYCAST-SEC2176.97.158.0/24 NICat-anycast-net}
			PTR	`dns3.a1.net`
MX	`jtcomputer-at0e.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::7^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::a^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-du0pr03cu00102.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::d^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db6pr03cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::8^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.18^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00302.inbound.protection.outlook.com`
		A	52.101.73.4^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr83cu00404.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
TXT	`gS25hnAugsfkgUmQOVTCNktuTz6krO/wWCe5mZoJNwO51ivXpqy13gaYpBTLbqX7zUSlXPpdUYe0g...`
TXT	`v=spf1 mx a:mail.jt-computer.at a:www.jt-computer.at include:autotask.net inc...`
TXT	`MS=EF1C8B4B818367CDA1E94B34FE8D4D4659D5D9F3`
SOA	`dns1.a1.net`domainadmin@a1.net 2026-02-09 #0

`at`

	DNSSEC	🔒 Signed (DS record present)
	NS	`dns.nic.at` ⭐
	NS	`d.ns.at` 🔒
	NS	`j.ns.at` 🔒
	NS	`n.ns.at` 🔒
	NS	`ns1.univie.ac.at`
	NS	`ns2.univie.ac.at`
	NS	`r.ns.at` 🔒
	NS	`u.ns.at` 🔒
	SOA	`dns.nic.at`domain-admin@univie.ac.at serial=1771290002

Subdomains

mail.jt-computer.at

DNS History

9 records (4 active, 5 former)

●NSdns1.a1.net2026-03-20 → 2026-03-20 · 3 obs

○ 2016-11-27 07:34:28
● 2026-03-20 06:50:18
● 2026-03-20 06:50:20

○NSdns1.jt-computer2016-11-27 → 2016-11-27 · 4 obs

○ 2015-05-31 05:00:44
● 2016-11-27 07:34:28
○ 2026-03-20 06:50:18
○ 2026-03-20 06:50:20

○NSdns1.jt-computer.at2015-05-31 → 2016-11-27 · 4 obs

● 2015-05-31 05:00:44
● 2016-11-27 07:34:28
○ 2026-03-20 06:50:18
○ 2026-03-20 06:50:20

●NSdns2.a1.net2026-03-20 → 2026-03-20 · 3 obs

○ 2016-11-27 07:34:28
● 2026-03-20 06:50:18
● 2026-03-20 06:50:20

●NSdns3.a1.net2026-03-20 → 2026-03-20 · 3 obs

○ 2016-11-27 07:34:28
● 2026-03-20 06:50:18
● 2026-03-20 06:50:20

○NSdns4.telekom.at2015-05-31 → 2016-11-27 · 4 obs

● 2015-05-31 05:00:44
● 2016-11-27 07:34:28
○ 2026-03-20 06:50:18
○ 2026-03-20 06:50:20

○NSdns5.telekom.at2015-05-31 → 2016-11-27 · 4 obs

● 2015-05-31 05:00:44
● 2016-11-27 07:34:28
○ 2026-03-20 06:50:18
○ 2026-03-20 06:50:20

●MXjtcomputer-at0e.mail.protection.outlook.com2026-03-20 → 2026-03-20 · 3 obs

○ 2016-11-27 07:34:28
● 2026-03-20 06:50:18
● 2026-03-20 06:50:20

○MXmail.jt-computer.at2015-05-31 → 2016-11-27 · 4 obs

● 2015-05-31 05:00:44
● 2016-11-27 07:34:28
○ 2026-03-20 06:50:18
○ 2026-03-20 06:50:20

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
at	d.ns.at, j.ns.at, n.ns.at, r.ns.at...	-
jt-computer.at	dns3.a1.net, dns2.a1.net, dns1.a1.net	-

✅ Authoritative Response

Server: 176.97.158.105

NS records: dns3.a1.net, dns2.a1.net, dns1.a1.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jt-computer.at (unsigned zone)

⏱️ Timing

Total: 1344ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	3	`dns1.a1.net, dns2.a1.net...`
MX	1	`jtcomputer-at0e.mail.protection.outlook.`
TXT	3	`gS25hnAugsfkgUmQOVTCNktuTz6krO/wWCe5mZoJ, MS=EF1C8B4B818367CDA1E94B34FE8D4D4659D5D...`
SOA	1	`dns1.a1.net domainadmin.a1.net`

Analysis

Hierarchy

The parent of mail.jt-computer.at is jt-computer.at.

Name Servers

jt-computer.at is delegated to three name servers: dns1.a1.net, dns2.a1.net and dns3.a1.net.

jt-computer.at partially shares name servers with other domains; examples include allesboden.at, malekherbst.com, berger-logistik.com, kaerntnerland-gbv.at and richter-pharma.at.

Host names with four IP numbers:

dns2.a1.net points to: 2001:67c:1bc::105, 2001:850:3010:101:213:33:99:79, 192.174.68.105 and 213.33.99.79.

Host names with two IP numbers:

dns1.a1.net points to: 2001:850:3030:31:80:120:17:26 and 80.120.17.26.

dns3.a1.net points to: 2001:67c:10b8::105 and 176.97.158.105.

Mail Servers

jt-computer.at is handled by a single mail server, jtcomputer-at0e.mail.protection.outlook.com.

Hostname jtcomputer-at0e.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:ca04::7, 2a01:111:f403:ca04::a, 2a01:111:f403:ca04::d, 2a01:111:f403:ca09::8, 52.101.68.3, 52.101.68.18, 52.101.73.4 and 52.101.73.11.

jt-computer.at - robtex.com

jt-computer.at

at

Subdomains

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

Name Servers

Mail Servers

`jt-computer.at`

`at`