cst.dk

📜 Historical scan 2026-06-25 18:28:02 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cst.dk is a .dk domain served by 2 nameservers (ns1.ku.dk, ns2.ku.dk). It was registered on 29 October 1996 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 130.225.251.141 is hosted by IDDQD-AS (AS1835) in Denmark. Mail is handled by ku-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 178ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.ku.dk	2001:878:1070:10::174	ns1.ku.dk	AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education
ns2.ku.dk	192.38.110.190 2001:878:1070:11::190	ns2.ku.dk ns2.ku.dk	AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education AS1835 FSKNET-DK Forskningsnettet - Danish network for Research and Education

🌍 A Records#

1 records 206ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
130.225.251.141	2226s	—	AS1835	IDDQD-AS	130.225.0.0/16	🇩🇰 Denmark	Copenhagen

📧 MX Records#

1 records 185ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	171006s	ku-dk.mail.protection.outlook.com	2a01:111:f403:ca04::5 2a01:111:f403:ca04::a 2a01:111:f403:ca09::7 2a01:111:f403:ca09::f 52.101.68.36 52.101.73.11 52.101.73.22 52.101.73.8	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-am0pr04cu00500.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	130.225.201.107
🔶 Autoconfig	130.225.201.107

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

3 records 1086ms

TXT Record
clojars simongray
MS=ms29711794
v=spf1 mx include:spf.protection.outlook.com a:unicph-gw.ku.dk include:bulk.spf.ku.dk ip4:92.43.124.147 ip4:92.43.124.21 ~all

✉️ SPF#

Policy	Record (cst.dk)
~all (soft fail)	v=spf1 mx include:spf.protection.outlook.com a:unicph-gw.ku.dk include:bulk.spf.ku.dk ip4:92.43.124.147 ip4:92.43.124.21 ~all

📨 DMARC#

Policy	Record (_dmarc.cst.dk)
p=quarantine	v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:upglztho@ag.eu.dmarcadvisor.com; ruf=mailto:upglztho@fr.eu.dmarcadvisor.com; pct=100; fo=1; ri=3600

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-15 17:26:24

www CNAME	cst.dk (all on cst.dk) → 130.225.251.141 (AS1835)
www vs bare domain	Same network cst.dk: 130.225.251.141 (AS1835) www.cst.dk: 130.225.251.141 (AS1835)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-cst-dk._domainkey.alumni.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-cst-dk._domainkey.alumni.onmicrosoft.com	RSA · ~1024 bit below 2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

301ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

208ms

Field	Value
Serial	2026062501
Primary NS (MNAME)	ns1.ku.dk
Responsible (RNAME)	hostmaster@adm.ku.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-08 08:59:44

Field	Value
Registrar	CURANET A/S
Registered	1996-10-29
Expires	2026-12-31 (75d)

📋 WHOIS#

⏱️ Lookup Timing#

178ms

206ms

185ms

AAAA

164ms

TXT

1086ms

CAA

222ms

HTTPS

216ms

TLSA

332ms

SOA

208ms

MTA-STS

617ms

DNSSEC

301ms

SRV

653ms

Total

2555ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-15 17:26:24	2730ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-08 11:01:44	1670ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-08 08:26:56	1713ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-01 06:46:17	2796ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-01 05:21:41	2145ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-24 03:09:32	3630ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-21 14:58:27	1632ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-11 02:52:11	2585ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-03 22:58:04	1808ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-27 14:29:46	1082ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-20 08:35:26	1838ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-15 06:09:42	5824ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-10 08:11:34	2326ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-31 21:54:05	2704ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-23 05:53:43	17046ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-16 15:51:41	9436ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-09 05:34:50	1987ms	2 NS 1 A 1 MX	🔓 Insecure
2026-07-02 15:34:33	1905ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-25 18:28:02 shown	2555ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-21 04:29:08	1684ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-16 23:05:51	780ms	2 NS 1 A 1 MX	🔓 Insecure