ctn.dk

📜 Historical scan 2026-07-02 01:43:26 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

ctn.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was registered on 23 July 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 94.231.101.82 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by ctn-dk.mail.protection.outlook.com. 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 163ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 136ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
94.231.101.82	3600s	linux80.curanet.dk	AS48854	team.blue Denmark A/S	94.231.96.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 144ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	ctn-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::7 2a01:111:f403:ca04::a 2a01:111:f403:ca09::20 52.101.68.16 52.101.73.15 52.101.73.24 52.101.73.8	mail-db4pr02cu00406.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-as8pr05cu00400.inbound.protection.outlook.com mail-db4pr02cu00400.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-as8pr05cu00300.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	autodiscover.outlook.com → 40.104.116.8

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 313ms

TXT Record
MS=ms58554505
v=spf1 include:spf.protection.outlook.com include:spf.curanet.dk -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.ctn.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@ctn.dk; ruf=mailto:dmarc@ctn.dk; fo=1

📬 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 2026-10-09 03:38:27

www CNAME	ctn.dk (all on ctn.dk) → 94.231.101.82 (AS48854)
www vs bare domain	Same network ctn.dk: 94.231.101.82 (AS48854) www.ctn.dk: 94.231.101.82 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-ctn-dk._domainkey.centerfortandregulering.onmicrosoft.com	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: 4/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

297ms

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

🏷️ SOA#

246ms

Field	Value
Serial	2023061501
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-05 16:16:44

Field	Value
Registrar	CURANET A/S
Registered	2007-07-23
Expires	2027-07-31 (286d)

📋 WHOIS#

⏱️ Lookup Timing#

163ms

136ms

144ms

AAAA

156ms

TXT

313ms

CAA

153ms

HTTPS

204ms

TLSA

351ms

SOA

246ms

MTA-STS

230ms

DNSSEC

297ms

SRV

232ms

Total

1386ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 02:45:33	1065ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-28 04:24:41	816ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-02 01:43:26 shown	1386ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-02 01:22:54	903ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 23:11:42	705ms	2 NS 1 A 1 MX	🔒 Secure