sdt.dk

📜 Historical scan 2026-08-20 21:37:18 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sdt.dk is a .dk domain served by 5 nameservers (ns1.gigahost.dk, ns2.gigahost.dk, ns3.gigahost.dk and 2 more). It was registered on 15 April 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 46.183.138.100 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by sdt-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#

5 records 59ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.gigahost.dk	46.183.139.31	ns1.gigahost.dk	AS47292 Sentia Denmark A/S
ns2.gigahost.dk	46.183.139.222	web22.gigahost.dk	AS47292 Sentia Denmark A/S
ns3.gigahost.dk	71.19.249.71	ns3.gigahost.dk	AS11831 eSecureData
ns4.gigahost.dk	51.79.215.130	ns4.gigahost.dk	AS16276 OVH SAS
ns5.gigahost.dk	77.74.192.83	ns5.gigahost.dk	AS42831 UK Dedicated Servers Limited

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.183.138.100	3600s	—	AS47292	Sentia Denmark A/S	46.183.138.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 41ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	sdt-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::8 2a01:111:f403:ca09::2 2a01:111:f403:ca09::4 52.101.68.0 52.101.68.25 52.101.68.5 52.101.73.28	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am0pr04cu00504.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am7pr05cu00204.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	autodiscover.outlook.com → 40.104.116.24
🔶 Autoconfig	sdt.dk → 46.183.138.100

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

5 records 402ms

TXT Record
MS=ms15412970
selector1-sdt-dk._domainkey.sdtdk.n-v1.dkim.mail.microsoft
selector2-sdt-dk._domainkey.sdtdk.n-v1.dkim.mail.microsoft
spf2.0/pra
v=spf1 include:spf.gigahost.dk include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (sdt.dk)
-all (hard fail)	v=spf1 include:spf.gigahost.dk include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.sdt.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@gigahost.dk;

📬 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 2026-10-23 02:39:03

www CNAME	sdt.dk (all on sdt.dk) → 46.183.138.100 (AS47292)
www vs bare domain	Same network sdt.dk: 46.183.138.100 (AS47292) www.sdt.dk: 46.183.138.100 (AS47292)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 2/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.sdt.dk	sdt.dk

🔗 TLSA / DANE#

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

🔐 DNSSEC#

91ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026082001
Primary NS (MNAME)	ns1.gigahost.dk
Responsible (RNAME)	hostmaster@sdt.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-15 17:30:37

Field	Value
Registrar	GIGAHOST ApS
Registered	2018-04-15
Expires	2027-04-30 (189d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
frankl.dk	GIGAHOST ApS
hi-five.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

59ms

36ms

41ms

AAAA

45ms

TXT

402ms

CAA

213ms

HTTPS

51ms

TLSA

612ms

SOA

0ms

MTA-STS

89ms

DNSSEC

91ms

SRV

308ms

Total

2327ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-23 02:39:03	862ms	5 NS 1 A 1 MX	🔓 Insecure
2026-10-15 03:36:27	2129ms	5 NS 1 A 1 MX	🔓 Insecure
2026-10-08 17:20:34	4465ms	5 NS 1 A 1 MX	🔓 Insecure
2026-10-01 14:18:06	3716ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-30 14:10:50	1103ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-24 11:10:47	1414ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-18 10:05:55	1435ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-11 07:43:22	1848ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-08 17:23:08	1547ms	5 NS 1 A 1 MX	🔓 Insecure
2026-08-27 09:12:17	1718ms	5 NS 1 A 1 MX	🔓 Insecure
2026-08-20 21:37:18 shown	2327ms	5 NS 1 A 1 MX	🔓 Insecure
2026-08-13 16:21:45	2731ms	5 NS 1 A 1 MX	🔓 Insecure
2026-08-08 02:29:58	11191ms	5 NS 1 A 1 MX	🔓 Insecure
2026-08-03 07:44:12	1797ms	5 NS 1 A 1 MX	🔓 Insecure
2026-07-23 03:45:17	1935ms	5 NS 1 A 1 MX	🔓 Insecure
2026-07-17 03:17:26	1936ms	5 NS 1 A 1 MX	🔓 Insecure
2026-07-09 03:46:13	11408ms	5 NS 1 A 1 MX	🔓 Insecure
2026-07-02 13:50:56	1335ms	5 NS 1 A 1 MX	🔓 Insecure
2026-06-26 09:28:02	4175ms	5 NS 1 A 1 MX	🔓 Insecure
2026-06-22 23:16:22	1099ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-21 12:46:20	1178ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-18 00:10:56	1650ms	5 NS 1 A 1 MX	🔓 Insecure