stacken.kth.se - dns.ninja

`stacken.kth.se`

DNSSEC	⚠️ Not signed
A	2001:6b0:1:ea::40^{🇸🇪 SUNET2001:6b0::/32 The Swedish University Network}
A	130.237.234.40^{🇸🇪 SUNET130.237.0.0/16 KTH-LAN}
NS	`ns.stacken.kth.se` ⭐
		A	130.237.234.17^{🇸🇪 SUNET130.237.0.0/16 KTH-LAN}
			PTR	`ns.stacken.kth.se`
NS	`b.ns.kth.se`
		A	2001:6b0:1::250^{🇸🇪 SUNET2001:6b0::/32 The Swedish University Network}
			PTR	`b.ns.kth.se`
		A	130.237.72.250^{🇸🇪 SUNET130.237.0.0/16 KTH-LAN}
			PTR	`b.ns.kth.se`
NS	`primary.se`
		A	2a01:298:4::53^{🇸🇪 SPACEDUMP-AS2a01:298::/32 SpaceDump IT AB IPv6 Net}
			PTR	`primary.se`
		A	192.36.115.53^{🇸🇪 SPACEDUMP-AS192.36.115.0/24 Route for Besserwisser network}
			PTR	`primary.se`
NS	`secondary.se` 🔒
		A	2a05:d018:184:4853::53^{🇮🇪 Amazon2a05:d018::/38 AMAZON AWS}
MX	`mailfilter-ng-1.sunet.se` ⭐
		A	2001:6b0:8:2::207^{🇸🇪 SUNET2001:6b0::/32 The Swedish University Network}
			PTR	`mailfilter-ng-1.sunet.se`
		A	192.36.171.207^{🇸🇪 NORDUNET192.36.171.0/24 -SERVICES}
			PTR	`mailfilter-ng-1.sunet.se`
MX	`mailfilter-ng-3.sunet.se` ⭐
		A	2001:6b0:8:2::200^{🇸🇪 SUNET2001:6b0::/32 The Swedish University Network}
			PTR	`mailfilter-ng-3.sunet.se`
		A	192.36.171.200^{🇸🇪 NORDUNET192.36.171.0/24 -SERVICES}
MX	`mailfilter-ng-4.sunet.se` ⭐
		A	89.45.235.5^{🇸🇪 SUNET89.45.232.0/21 -AGGREGATE}
			PTR	`mailfilter-89-45-235-5.instance.cloud.sunet.se`
MX	`mailfilter-ng-2.sunet.se`⁽²⁰⁾
		A	89.45.235.13^{🇸🇪 SUNET89.45.232.0/21 -AGGREGATE}
			PTR	`mailfilter-89-45-235-13.instance.cloud.sunet.se`
TXT	`v=spf1 mx a:mail-1.stacken.kth.se a:mail-2.stacken.kth.se include:_spf.kth.se...`
SOA	`ns.stacken.kth.se`hostmaster@stacken.kth.se 2026-07-30 #3

`kth.se`

	DNSSEC	🔒 Signed (DS record present)
	A	2001:6b0:1:11c2::82ed:1c28^{🇸🇪 SUNET2001:6b0::/32 The Swedish University Network}
	A	130.237.28.40^{🇸🇪 SUNET130.237.0.0/16 KTH-LAN}
	NS	`a.ns.kth.se` ⭐
	NS	`b.ns.kth.se`
	NS	`e.ns.kth.se`
	NS	`ns2.chalmers.se`
	NS	`sunic.sunet.se`
	MX	`mailfilter-ng-1.sunet.se` ⭐
	MX	`mailfilter-ng-3.sunet.se` ⭐
	MX	`mailfilter-ng-4.sunet.se` ⭐
	MX	`mailfilter-ng-2.sunet.se`⁽²⁰⁾
	TXT	`google-site-verification=6B_ijtuPLs8QEQOrY6CA9KNR6x_Tlq9h87fvzbQcTGk`
	TXT	`adobe-idp-site-verification=9cb3a0e2a6197322d0dd6d29de0e1ac1ce9f990e3d5bd864a...`
	TXT	`KTH Royal Institute of Technology, SWEDEN`
	TXT	`MS=ms86914267`
	TXT	`facebook-domain-verification=ybxcywd9y5omfyzv9a4hi1122pxhys`
	TXT	`v=spf1 include:_spf.kth.se include:customers.clickdimensions.com ~all`
	TXT	`atlassian-domain-verification=bdViuC6aa8uovu2aPgsZjA4zglkgbkqx7eCtfJtIXi6uWFg...`
	TXT	`apple-domain-verification=yiK5a1btuIncRk6Q`
	TXT	`include:_spf.eu.messagegears.net`
	TXT	`HARICA-2QmDZC3DyhpI9p6wUi3`
	TXT	`mentimeter-22c50963-9801-4565-a424-07d4a1e2c1c9`
	SOA	`a.ns.kth.se`hostmaster@kth.se 2026-08-14 #9

WOT: SAFE (90/100)
rank #2765 globally
rank #9 in the tld

kth.se

kth.seis the official website of KTH Royal Institute of Technology (Kungliga Tekniska högskolan), a public research university in Stockholm, Sweden, and one of Europe's leading technical universities.

Key facts

Owner / operator: KTH Royal Institute of Technology (Kungliga Tekniska högskolan) — Swedish state university
TLD:.se— Sweden (ccTLD)
Primary purpose: Official university website — institutional information, research, admissions, staff and student services
Status: Active

WOT: SAFE (91/100)
📈 Tranco rank: #7,430

Subdomains

athlon.stacken.kth.se

dyn-180.stacken.kth.se

p.stacken.kth.se

ivy-mike.stacken.kth.se

mail-2.stacken.kth.se

natasha.stacken.kth.se

karelin.stacken.kth.se

nexus.stacken.kth.se

athena.stacken.kth.se

murmansk2.stacken.kth.se

skumbil.stacken.kth.se

dyn-195.stacken.kth.se

dyn-181.stacken.kth.se

clubroom-gw.stacken.kth.se

dyn-175.stacken.kth.se

elvira.stacken.kth.se

lien-x.stacken.kth.se

glass.stacken.kth.se

karspexet-ampel.stacken.kth.se

mail-1.stacken.kth.se

poasdebian.stacken.kth.se

hawknest.stacken.kth.se

dyn-191.stacken.kth.se

spex2.stacken.kth.se

georg-scheutz.stacken.kth.se

ben-and-jerrys.stacken.kth.se

opal-i.stacken.kth.se

snacks.stacken.kth.se

abodeux.stacken.kth.se

haagen-dazs.stacken.kth.se

jabber.stacken.kth.se

mjukglass.stacken.kth.se

ns.stacken.kth.se

shake.stacken.kth.se

hot.stacken.kth.se

alex.stacken.kth.se

imladris.stacken.kth.se

rproxy.stacken.kth.se

mail-srv-ip.stacken.kth.se

dyn-194.stacken.kth.se

kvantitet.stacken.kth.se

udon.stacken.kth.se

clogs.stacken.kth.se

dyn-179.stacken.kth.se

hal.stacken.kth.se

spex3.stacken.kth.se

www.stacken.kth.se

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stacken.se

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stacken.de

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DNS History

13 records (10 active, 3 former)

●NSb.ns.kth.se2015-07-11 → 2026-08-14 · 31 obs

● 2015-07-11 06:14:28
● 2026-02-16 06:02:00
○ 2026-02-16 14:42:38
● 2026-02-17 18:42:02
● 2026-03-05 14:01:24
○ 2026-03-07 02:20:26
● 2026-03-07 12:15:56
● 2026-03-26 21:32:58
○ 2026-03-27 14:23:06
● 2026-03-28 14:26:20
● 2026-04-02 12:02:04
○ 2026-04-04 04:24:18
● 2026-04-04 10:47:24
○ 2026-04-05 21:25:20
● 2026-04-07 20:17:02
● 2026-04-09 02:18:10
○ 2026-04-09 09:04:42
● 2026-04-09 13:44:14
● 2026-04-21 08:50:06
○ 2026-04-21 10:12:28
● 2026-04-21 18:57:34
● 2026-04-22 03:59:26
○ 2026-04-29 19:40:26
● 2026-04-30 23:54:44
● 2026-05-13 17:18:46
○ 2026-05-28 00:47:02
● 2026-06-05 07:06:42
● 2026-06-12 23:07:00
○ 2026-06-13 01:55:04
● 2026-06-13 08:14:10
● 2026-08-14 06:45:00

●NSns.stacken.kth.se2015-07-11 → 2026-08-14 · 2 obs

● 2015-07-11 06:14:28
● 2026-08-14 06:45:00

●NSprimary.se2015-07-11 → 2026-08-14 · 31 obs

●NSsecondary.se2015-07-11 → 2026-08-14 · 31 obs

●MXmailfilter-ng-1.sunet.se2026-02-16 → 2026-08-14 · 31 obs

○ 2017-09-10 00:03:00
● 2026-02-16 06:02:00
● 2026-03-14 21:21:44
○ 2026-03-22 16:17:22
● 2026-03-25 18:40:02
● 2026-04-02 12:02:04
○ 2026-04-04 04:24:18
● 2026-04-04 10:47:24
○ 2026-04-05 21:25:20
● 2026-04-07 20:17:02
● 2026-04-09 02:18:10
○ 2026-04-09 09:04:42
● 2026-04-09 13:44:14
● 2026-04-21 08:50:06
○ 2026-04-21 10:12:28
● 2026-04-21 18:57:34
○ 2026-04-22 03:59:26
● 2026-04-29 19:40:26
● 2026-04-30 23:54:44
○ 2026-05-09 15:04:00
● 2026-05-10 00:00:24
● 2026-05-28 00:47:02
○ 2026-06-05 07:06:42
● 2026-06-09 03:28:14
● 2026-06-12 23:07:00
○ 2026-06-13 01:55:04
● 2026-06-13 08:14:10
○ 2026-06-23 05:22:12
● 2026-07-03 21:18:34
○ 2026-07-23 07:40:38
● 2026-08-14 06:45:00

●MXmailfilter-ng-2.sunet.se2026-02-16 → 2026-08-14 · 31 obs

●MXmailfilter-ng-3.sunet.se2026-02-16 → 2026-08-14 · 31 obs

●MXmailfilter-ng-4.sunet.se2026-02-16 → 2026-08-14 · 31 obs

○MXmx.kth.se2015-07-11 → 2017-09-10 · 4 obs

● 2015-07-11 06:14:28
● 2017-09-10 00:03:00
○ 2026-02-16 06:02:00
○ 2026-08-14 06:45:00

○A130.237.234.392015-07-11 → 2017-09-10 · 4 obs

● 2015-07-11 06:14:28
● 2017-09-10 00:03:00
○ 2026-02-16 06:02:00
○ 2026-08-14 06:45:00

●A130.237.234.402026-02-16 → 2026-08-14 · 34 obs

○ 2017-09-10 00:03:00
● 2026-02-16 06:02:00
● 2026-02-20 13:57:58
○ 2026-02-23 22:30:26
● 2026-02-25 13:22:04
● 2026-03-05 14:01:24
○ 2026-03-07 02:20:26
● 2026-03-07 12:15:56
● 2026-03-14 21:21:44
○ 2026-03-22 16:17:22
● 2026-03-25 18:40:02
● 2026-03-26 21:32:58
○ 2026-03-27 14:23:06
● 2026-03-28 14:26:20
● 2026-04-02 12:02:04
○ 2026-04-04 04:24:18
● 2026-04-04 10:47:24
○ 2026-04-05 21:25:20
● 2026-04-07 20:17:02
● 2026-04-18 09:10:14
○ 2026-04-19 05:41:06
● 2026-04-20 04:56:14
● 2026-04-21 10:12:28
○ 2026-04-21 18:57:34
● 2026-04-22 03:59:26
● 2026-05-13 17:18:46
○ 2026-05-28 00:47:02
● 2026-06-05 07:06:42
● 2026-06-12 23:07:00
○ 2026-06-13 01:55:04
● 2026-06-13 08:14:10
○ 2026-06-23 05:22:12
● 2026-07-03 21:18:34
● 2026-08-14 06:45:00

○A2001:6b0:1:ea::392015-07-11 → 2017-09-10 · 4 obs

● 2015-07-11 06:14:28
● 2017-09-10 00:03:00
○ 2026-02-16 06:02:00
○ 2026-08-14 06:45:00

●A2001:6b0:1:ea::402026-02-16 → 2026-08-14 · 35 obs

○ 2017-09-10 00:03:00
● 2026-02-16 06:02:00
○ 2026-02-16 14:42:38
○ 2026-02-17 18:42:02
● 2026-02-20 13:57:58
○ 2026-02-23 22:30:26
● 2026-02-25 13:22:04
● 2026-03-05 14:01:24
○ 2026-03-07 02:20:26
● 2026-03-07 12:15:56
● 2026-04-02 12:02:04
○ 2026-04-04 04:24:18
● 2026-04-04 10:47:24
○ 2026-04-05 21:25:20
● 2026-04-07 20:17:02
● 2026-04-09 02:18:10
○ 2026-04-09 09:04:42
● 2026-04-09 13:44:14
● 2026-04-18 09:10:14
○ 2026-04-19 05:41:06
● 2026-04-20 04:56:14
● 2026-04-21 08:50:06
○ 2026-04-21 10:12:28
○ 2026-04-29 19:40:26
● 2026-04-30 23:54:44
● 2026-06-12 23:07:00
○ 2026-06-13 01:55:04
● 2026-06-13 08:14:10
○ 2026-06-14 05:06:28
● 2026-06-19 03:27:56
○ 2026-06-23 05:22:12
● 2026-07-03 21:18:34
○ 2026-07-04 11:53:14
● 2026-07-07 12:11:04
● 2026-08-14 06:45:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
se	f.ns.se, i.ns.se, b.ns.se, z.ns.se...	-
kth.se	ns2.chalmers.se, sunic.sunet.se, a.ns.kth.se, b.ns.kth.se...	9 records
stacken.kth.se	b.ns.kth.se, secondary.se, primary.se, ns.stacken.kth.se	2 records

✅ Authoritative Response

Server:130.237.72.250

NS records: b.ns.kth.se, secondary.se, primary.se, ns.stacken.kth.se

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for stacken.kth.se (unsigned zone)

⏱️ Timing

Total: 869ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`130.237.234.40`
AAAA	1	`2001:6b0:1:ea::40`
NS	4	`secondary.se, b.ns.kth.se...`
MX	4	`mailfilter-ng-1.sunet.se (pri: 10), mailfilter-ng-3.sunet.se (pri: 10)...`
TXT	1	`v=spf1 mx a:mail-1.stacken.kth.se a:mail`
SOA	1	`ns.stacken.kth.se hostmaster.stacken.kth`

📌 Glue Records Collected

Total: 11

In-bailiwick: 7 (a.ns.kth.se, b.ns.kth.se, e.ns.kth.se...)

Out-of-bailiwick: 4 (sunic.sunet.se, ns2.chalmers.se, sunic.sunet.se...)

Analysis

Hierarchy

stacken.kth.se is the parent domain of athlon.stacken.kth.se, dyn-180.stacken.kth.se, p.stacken.kth.se, ivy-mike.stacken.kth.se, mail-2.stacken.kth.se and a few other host names.

IP Addresses

stacken.kth.se directs to two IP numbers, 130.237.234.40 and 2001:6b0:1:ea::40

rproxy.stacken.kth.se, for instance, is one of the other host names sharing IP numbers with stacken.kth.se.

Name Servers

stacken.kth.se has four authoritative name servers: primary.se, secondary.se, b.ns.kth.se and ns.stacken.kth.se.

stacken.kth.se shares at least some of its name servers with other domains, including che.kth.se, conf.kth.se, atom.kth.se and two others.

These name servers are frequently seen alongside a.ns.kth.se, e.ns.kth.se, mariehamn.kurtis.pp.se and 6 other name servers.

Host names with two IP numbers:

primary.se directs traffic to 192.36.115.53 and 2a01:298:4::53.

b.ns.kth.se directs traffic to 130.237.72.250 and 2001:6b0:1::250.

Host names pointing to a single IP address:

secondary.se has the IP address 2a05:d018:184:4853::53.

ns.stacken.kth.se has the IP address 130.237.234.17.

Mail Servers

Four mail servers handle email for stacken.kth.se: mailfilter-ng-1.sunet.se, mailfilter-ng-2.sunet.se, mailfilter-ng-3.sunet.se and mailfilter-ng-4.sunet.se.

stacken.kth.se shares mail servers — at least in part — with other domains, including suda.su.se, pcr.uu.se, ucr.uu.se and two others.

These mail servers are frequently seen alongside the mail servers mail.irfu.se.

Host names with two IP numbers:

mailfilter-ng-1.sunet.se directs traffic to 192.36.171.207 and 2001:6b0:8:2::207.

mailfilter-ng-3.sunet.se directs traffic to 192.36.171.200 and 2001:6b0:8:2::200.

Host names pointing to a single IP address:

mailfilter-ng-2.sunet.se has the IP address 89.45.235.13.

mailfilter-ng-4.sunet.se has the IP address 89.45.235.5.