retnu.dk

📜 Historical scan 2026-09-17 13:33:00 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

retnu.dk is a .dk domain served by 2 nameservers (marge.ns.cloudflare.com, ryan.ns.cloudflare.com). It was registered on 20 May 2003 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by retnu-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no 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 114ms

Nameserver	IP addresses	PTR	ASN / ISP
marge.ns.cloudflare.com	108.162.192.191 172.64.32.191 173.245.58.191 2606:4700:50::adf5:3abf 2803:f800:50::6ca2:c0bf 2a06:98c1:50::ac40:20bf	marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com marge.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
ryan.ns.cloudflare.com	108.162.195.229 162.159.44.229 172.64.35.229 2606:4700:58::a29f:2ce5 2803:f800:50::6ca2:c3e5 2a06:98c1:50::ac40:23e5	ryan.ns.cloudflare.com ryan.ns.cloudflare.com ryan.ns.cloudflare.com ryan.ns.cloudflare.com ryan.ns.cloudflare.com ryan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 119ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	retnu-dk.mail.protection.outlook.com	2a01:111:f403:c967::c 2a01:111:f403:ca09::28 2a01:111:f403:ca21::e 2a01:111:f403:ca3c::6 52.101.103.143 52.101.103.36 52.101.185.114 52.101.68.12	mail-cpjpr05cu00204.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-matpr04cu00306.inbound.protection.outlook.com mail-zrxpr04cu00106.inbound.protection.outlook.com mail-miypr03cu00107.inbound.protection.outlook.com mail-miypr05cu00104.inbound.protection.outlook.com mail-zrxpr04cu00102.inbound.protection.outlook.com mail-db9pr02cu00204.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 440ms

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

📝 TXT Records#

2 records 468ms

TXT Record
MS=ms40867065
v=spf1 include:spf.protection.outlook.com mx a -all

✉️ SPF#

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

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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 2026-10-02 18:37:23

www	NXDOMAIN
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 3/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.retnu.dk	78iFBvWbOfKQp4LAZGFlbizTBx53Pa2HnECc6vVYaFI
TXT	_acme-challenge.retnu.dk	IgIDi-AfYYXARnCIrRxhQy4__ESQyfQNzvqWzjg4EKg

🔗 TLSA / DANE#

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

🔐 DNSSEC#

167ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

0ms

Field	Value
Serial	2415001010
Primary NS (MNAME)	marge.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-17 14:37:15

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2003-05-20
Expires	2027-05-31 (219d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

114ms

103ms

119ms

AAAA

143ms

TXT

468ms

CAA

133ms

HTTPS

104ms

TLSA

182ms

SOA

0ms

MTA-STS

366ms

DNSSEC

167ms

SRV

440ms

Total

1520ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 18:37:23	1052ms	2 NS 0 A 1 MX	🔓 Insecure
2026-09-23 22:21:37	1021ms	2 NS 0 A 1 MX	🔓 Insecure
2026-09-17 13:33:00 shown	1520ms	2 NS 0 A 1 MX	🔓 Insecure
2026-08-27 15:23:49	1107ms	2 NS 0 A 1 MX	🔓 Insecure
2026-07-19 08:56:31	1447ms	2 NS 0 A 1 MX	🔓 Insecure
2026-07-17 04:53:18	1852ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-26 14:44:17	971ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-21 18:46:44	907ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 14:51:39	1019ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-20 05:46:41	665ms	2 NS 0 A 1 MX	🔓 Insecure
2026-06-18 06:21:56	1167ms	2 NS 0 A 1 MX	🔓 Insecure