sb-stu.dk

📜 Historical scan 2026-07-19 04:00:01 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sb-stu.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 13 November 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.34 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1-dk.centerasecurity.dk, mx2-dk.centerasecurity.dk and 1 more. The zone is DNSSEC-signed and validates, 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 39ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.34	600s	linux184.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

3 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1-dk.centerasecurity.dk	128.76.60.167 128.76.60.187 89.233.19.127 89.233.19.127 89.233.19.188 89.233.19.188	mx6.centerasecurity.dk mx6.centerasecurity.dk 127.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 188.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
10	3600s	mx2-dk.centerasecurity.dk	128.76.60.168 128.76.60.169 89.233.19.128 89.233.19.128 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk mx6.centerasecurity.dk 128.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S
20	3600s	mx3-dk.centerasecurity.dk	128.76.60.187 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3308 Norlys Telco A/S AS3308 Norlys Telco A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.99.210.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 131ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records#

2 records 169ms

TXT Record
MS=ms90731412
v=spf1 include:_sb-stu_dk.spf-protect.com -all

✉️ SPF#

Policy	Record (sb-stu.dk)
-all (hard fail)	v=spf1 include:_sb-stu_dk.spf-protect.com -all

📨 DMARC#

Policy	Record (_dmarc.sb-stu.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:685bf46bcddb0@dmarc-dk.centerasecurity.com;

📬 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 2026-10-24 21:07:09

www CNAME	sb-stu.dk (all on sb-stu.dk) → 93.191.156.34 (AS48854)
www vs bare domain	Same network sb-stu.dk: 93.191.156.34 (AS48854) www.sb-stu.dk: 93.191.156.34 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

6 records 8064ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…

🔐 DNSSEC#

109ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2026071801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-10 02:26:07

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-11-13
Expires	2026-11-30 (36d)

📋 WHOIS#

⏱️ Lookup Timing#

33ms

39ms

43ms

AAAA

34ms

TXT

169ms

CAA

38ms

HTTPS

37ms

TLSA

8064ms

SOA

0ms

MTA-STS

81ms

DNSSEC

109ms

SRV

131ms

Total

9184ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-24 21:07:09	780ms	2 NS 1 A 3 MX	🔒 Secure
2026-10-13 02:52:09	1514ms	2 NS 1 A 3 MX	🔒 Secure
2026-10-07 16:20:20	620ms	2 NS 1 A 3 MX	🔒 Secure
2026-09-11 18:04:55	894ms	2 NS 1 A 3 MX	🔒 Secure
2026-08-26 15:26:36	932ms	2 NS 1 A 3 MX	🔒 Secure
2026-08-13 15:41:15	5236ms	2 NS 1 A 3 MX	🔒 Secure
2026-07-19 04:00:01 shown	9184ms	2 NS 1 A 3 MX	🔒 Secure
2026-07-15 13:53:08	1168ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-17 22:31:48	884ms	2 NS 1 A 3 MX	🔒 Secure