rdskoler.dk

📜 Historical scan 2026-08-27 10:03:37 · ← 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 not DNSSEC-signed, 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 56ms

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 58ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
5	3600s	rdskoler-dk.mail.protection.outlook.com	2a01:111:f403:ca04::6 2a01:111:f403:ca04::b 2a01:111:f403:ca09::3 2a01:111:f403:ca09::f 52.101.68.10 52.101.68.18 52.101.73.153 52.101.73.8	mail-db4pr02cu00406.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-as8pr05cu00401.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 88ms

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

📝 TXT Records#

2 records 261ms

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#

145ms

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	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#

56ms

49ms

58ms

AAAA

51ms

TXT

261ms

CAA

76ms

HTTPS

49ms

TLSA

536ms

SOA

0ms

MTA-STS

108ms

DNSSEC

145ms

SRV

88ms

Total

1387ms

🕐 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 shown	1387ms	3 NS 0 A 1 MX	🔓 Insecure
2026-06-23 02:10:44	826ms	3 NS 0 A 1 MX	❓ Unknown
2026-06-18 07:33:55	3733ms	3 NS 0 A 1 MX	🔓 Insecure