rkmu.dk

📜 Historical scan 2026-06-23 00:45:35 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rkmu.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 29 May 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 217.116.232.215 is hosted by Sentia Denmark A/S (AS47292) in Denmark. Mail is handled by rkmu-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#

3 records 49ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.efif.dk	195.254.168.23	ns.efif.dk	AS51073 Aarhus Business College
ns2.efif.dk	195.254.168.12	ns2.efif.dk	AS51073 Aarhus Business College
ns3.efif.dk	20.23.170.35	—	AS8075 Microsoft Corporation

🌍 A Records#

1 records 31ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
217.116.232.215	3600s	215.giga-ptr.232.116.217.in-addr.arpa web15.gigahost.dk	AS47292	Sentia Denmark A/S	217.116.224.0/20	🇩🇰 Denmark	—

📧 MX Records#

1 records 42ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rkmu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::9 2a01:111:f403:ca04::a 2a01:111:f403:ca04::b 52.101.68.32 52.101.68.36 52.101.73.22 52.101.73.6	mail-db4pr02cu00204.inbound.protection.outlook.com mail-db7pr03cu00601.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-db3pr0202cu00200.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am7pr05cu00106.inbound.protection.outlook.com mail-am6pr04cu00306.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 → 40.104.116.40

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 204ms

TXT Record
MS=ms99353817
v=spf1 redirect=_spf.efif.dk

✉️ SPF#

Policy	Record (rkmu.dk)
redirect=_spf.efif.dk	v=spf1 redirect=_spf.efif.dk

📨 DMARC#

Policy	Record (_dmarc.rkmu.dk)
p=reject	v=DMARC1;p=reject;pct=100

📬 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 2026-10-20 05:31:59

www CNAME	rkmu.dk (all on rkmu.dk) → 217.116.232.215 (AS47292)
www vs bare domain	Same network rkmu.dk: 217.116.232.215 (AS47292) www.rkmu.dk: 217.116.232.215 (AS47292)
Wildcard	No
Denial of existence	NSEC3 · 50 iterations · 8-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-rkmu-dk._domainkey.efif.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: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

124ms

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

🏷️ SOA#

98ms

Field	Value
Serial	2019012485
Primary NS (MNAME)	ns.efif.dk
Responsible (RNAME)	dns-zc@efif.dk
Refresh	14400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-16 03:16:32

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-05-29
Expires	2027-05-31 (221d)

🔗 Same registrant#

3 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).

Domain	Registrar
danishbusinessacademies.dk	Simply.com A/S
dkea.dk	Punktum dk A/S (direct)
ealektor.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

49ms

31ms

42ms

AAAA

46ms

TXT

204ms

CAA

133ms

HTTPS

44ms

TLSA

455ms

SOA

98ms

MTA-STS

49ms

DNSSEC

124ms

SRV

194ms

Total

1041ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-20 05:31:59	3321ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-16 02:52:11	5173ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-14 01:29:46	1180ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-08 11:42:00	1311ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-07 11:26:43	1360ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-03 08:56:40	1004ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-29 08:37:36	2244ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-27 08:02:11	2424ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-23 06:33:46	7955ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-16 05:45:39	3746ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-10 11:13:05	7832ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-03 11:09:19	1553ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-30 01:02:31	2738ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-26 16:02:25	1095ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-24 08:25:23	4089ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-18 23:37:11	9304ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-13 10:42:48	2666ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-10 12:50:02	5403ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-07 07:21:52	11495ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-01 15:06:46	8523ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-26 23:22:20	5744ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-23 22:07:03	3396ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-22 21:17:11	7387ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-15 16:25:49	971ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-10 12:20:17	979ms	3 NS 1 A 1 MX	🔒 Secure