duf.dk

📜 Historical scan 2026-06-30 22:36:02 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

duf.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.46 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by duf-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 34ms

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 35ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.46	3600s	vm1440.enterprisecloud.nu	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	duf-dk.mail.protection.outlook.com	2a01:111:f403:ca04::c 2a01:111:f403:ca09::8 2a01:111:f403:ca09::9 2a01:111:f403:ca09::f 52.101.68.18 52.101.73.2 52.101.73.30 52.101.73.4	mail-db9pr02cu00204.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-as9pr07cu00302.inbound.protection.outlook.com mail-am7pr05cu00306.inbound.protection.outlook.com mail-am0pr83cu00404.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 → 52.98.149.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 67ms

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

📝 TXT Records#

7 records 123ms

TXT Record
1ppzs6ckmtpyn3ynzh2wcdrd9rdmg0x5
apple-domain-verification=FCB0MfyaN9YjvQU1
google-site-verification=pWtYPnDwOFDwFo5sO3EirAeu9XTbD79TAlJ0svpuMbk
klaviyo-site-verification=V9cAZ4
MS=ms70061798
openai-domain-verification=dv-SZw3rf9xgbD1Ly4JUyqNgoLz
v=spf1 include:spf.protection.outlook.com include:spfrerouting.xink.io ip4:94.137.135.220 ip4:94.137.135.221 ip4:87.116.2.93 ip4:178.72.21.186 ip4:178.72.21.222 include:spf.mandrillapp.com include:web.shared.mysmtp.com -all

✉️ SPF#

Policy	Record (duf.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spfrerouting.xink.io ip4:94.137.135.220 ip4:94.137.135.221 ip4:87.116.2.93 ip4:178.72.21.186 ip4:178.72.21.222 include:spf.mandrillapp.com include:web.shared.mysmtp.com -all

📨 DMARC#

Policy	Record (_dmarc.duf.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:kw4mtjma@ag.eu.dmarcian.com; ruf=mailto:kw4mtjma@fr.eu.dmarcian.com; 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 2026-10-01 03:20:30

www	Address record (no CNAME)
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#

2 found

Selector	CNAME	Key
selector1	selector1-duf-dk._domainkey.duf.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-duf-dk._domainkey.duf.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: 7/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

132ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026063001
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

34ms

35ms

37ms

AAAA

46ms

TXT

123ms

CAA

38ms

HTTPS

36ms

TLSA

212ms

SOA

0ms

MTA-STS

43ms

DNSSEC

132ms

SRV

67ms

Total

809ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 03:20:30	1002ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-01 00:43:57	1125ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-14 02:52:39	9619ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-13 01:49:07	9243ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-10 05:47:59	1741ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 22:36:02 shown	809ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-23 07:12:28	1096ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 04:55:37	749ms	2 NS 1 A 1 MX	🔒 Secure