rdskoler.dk

📜 Historical scan 2026-06-23 02:10:44 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rdskoler.dk is a .dk domain served by 3 nameservers (ns1.rudersdal.dk, ns2.rudersdal.dk, ns3.rudersdal.dk). It was registered on 25 June 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by rdskoler-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#

3 records 41ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.rudersdal.dk	185.85.44.55	—	AS200538 Rudersdal Kommune
ns2.rudersdal.dk	185.85.44.57	—	AS200538 Rudersdal Kommune
ns3.rudersdal.dk	185.85.44.72	—	AS200538 Rudersdal Kommune

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	3600s	rdskoler-dk.mail.protection.outlook.com	2a01:111:f403:ca04::7 2a01:111:f403:ca04::b 2a01:111:f403:ca09::2 2a01:111:f403:ca09::e 52.101.68.21 52.101.68.36 52.101.73.16 52.101.73.28	mail-db4pr02cu00307.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am0pr83cu00402.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-db4pr02cu00205.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-as2pr05cu00100.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 → 52.98.154.152

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 133ms

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

📝 TXT Records#

2 records 141ms

TXT Record
MS=ms11795143
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.rdskoler.dk)
p=quarantine	v=DMARC1; p=quarantine;

📬 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 2026-10-08 04:07:56

www	NXDOMAIN
www vs bare domain	Neither resolves rdskoler.dk: no address www.rdskoler.dk: no address
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-rdskoler-dk._domainkey.rudersdalskole.onmicrosoft.com	RSA · ~1024 bit below 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#

59ms

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

🏷️ SOA#

39ms

Field	Value
Serial	37
Primary NS (MNAME)	ns1.rudersdal.dk
Responsible (RNAME)	hostmaster@rudersdal.dk
Refresh	900s
Retry	600s
Expire	86400s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-10 13:19:18

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2014-06-25
Expires	2027-06-30 (253d)

📋 WHOIS#

⏱️ Lookup Timing#

41ms

36ms

43ms

AAAA

36ms

TXT

141ms

CAA

36ms

HTTPS

33ms

TLSA

319ms

SOA

39ms

MTA-STS

31ms

DNSSEC

59ms

SRV

133ms

Total

826ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 04:07:56	3274ms	3 NS 0 A 1 MX	🔓 Insecure
2026-09-30 20:55:05	713ms	3 NS 0 A 1 MX	🔓 Insecure
2026-08-27 10:03:37	1387ms	3 NS 0 A 1 MX	🔓 Insecure
2026-06-23 02:10:44 shown	826ms	3 NS 0 A 1 MX	❓ Unknown
2026-06-18 07:33:55	3733ms	3 NS 0 A 1 MX	🔓 Insecure