gtsdk.dk

📜 Historical scan 2026-06-24 07:26:26 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

gtsdk.dk is a .dk domain served by 2 nameservers (ns01.curadc.dk, ns02.curadc.dk). It was registered on 24 March 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.185.159.144 is hosted by Squarespace, Inc. (AS53831) in United States. Mail is handled by gtsdk-dk.mail.protection.outlook.com. The zone is of unknown DNSSEC status, 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.curadc.dk	185.158.206.52	ns01.curadc.dk	AS212991 CURAit A/S
ns02.curadc.dk	185.158.206.53	ns02.curadc.dk	AS212991 CURAit A/S

🌍 A Records#

3 records 75ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
198.185.159.144	600s	—	AS53831	Squarespace, Inc.	198.185.159.0/24	🇺🇸 United States	New York
198.185.159.145	600s	—	AS53831	Squarespace, Inc.	198.185.159.0/24	🇺🇸 United States	—
23.227.38.65	600s	myshopify.com	AS13335	Cloudflare, Inc.	23.227.38.0/23	🇨🇦 Canada	Ottawa

📧 MX Records#

1 records 85ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	600s	gtsdk-dk.mail.protection.outlook.com	2a01:111:f403:ca04::2 2a01:111:f403:ca04::a 2a01:111:f403:ca09::20 2a01:111:f403:ca09::7 52.101.68.25 52.101.68.36 52.101.73.12 52.101.73.19	mail-du2pr03cu00102.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-as8pr04cu00803.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 → 40.97.55.205
🔶 Autoconfig	23.227.38.65

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 105ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records#

5 records 149ms

TXT Record
_globalsign-domain-verification=-1CEcJa3qkm82CnPyEJ25FIxWorUZ75Zeh3311QWxL
_globalsign-domain-verification=aqKCZRcXRaeTD_1D7dskpjS17_xRntQ4DzVHrSHR8F
_globalsign-domain-verification=c2Cb8EQFoxuZcVKayagzfnYYXCJiyuCRBHRsGC_e__
eeid86ojgqq3ngvp8mtm5b62t4
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.gtsdk.dk)
p=reject	v=DMARC1; p=reject;

📬 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 18:56:37

www	23.227.38.65 (AS13335) (address records, no CNAME)
www vs bare domain	Same network gtsdk.dk: 198.185.159.144 198.185.159.145 23.227.38.65 (AS13335 AS53831) www.gtsdk.dk: 23.227.38.65 (AS13335)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-gtsdk-dk._domainkey.gtsdk.p-v1.dkim.mail.microsoft	RSA · ~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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

99ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'gtsdk.dk/DS/IN': 127.0.0.1#53

🏷️ SOA#

34ms

Field	Value
Serial	2026020401
Primary NS (MNAME)	ns01.curadc.dk
Responsible (RNAME)	hostmaster@gtsdk.dk
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-15 01:36:53

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1998-03-24
Expires	2027-03-31 (164d)

🔗 Same registrant#

1 domain

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
gunnartstrøm.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

33ms

75ms

85ms

AAAA

35ms

TXT

149ms

CAA

26ms

HTTPS

34ms

TLSA

824ms

SOA

34ms

MTA-STS

45ms

DNSSEC

99ms

SRV

105ms

Total

1341ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-26 17:30:46	1371ms	2 NS 3 A 1 MX	🔓 Insecure
2026-06-24 07:26:26 shown	1341ms	2 NS 3 A 1 MX	❓ Unknown
2026-06-23 18:53:00	994ms	2 NS 3 A 1 MX	🔓 Insecure
2026-06-17 10:12:49	4568ms	2 NS 3 A 1 MX	🔓 Insecure