rkrnet.dk

📜 Historical scan 2026-08-12 05:19:45 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rkrnet.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 12 December 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by rkrnet-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#

4 records 255ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 251ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rkrnet-dk.mail.protection.outlook.com	2a01:111:f403:ca04::1 2a01:111:f403:ca04::f 2a01:111:f403:ca09:: 2a01:111:f403:ca09::3 52.101.68.10 52.101.68.27 52.101.68.36 52.101.73.22	mail-db7pr03cu00401.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-am6pr04cu00303.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db7pr03cu00503.inbound.protection.outlook.com mail-db5pr02cu00104.inbound.protection.outlook.com mail-am7pr05cu00106.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

📝 TXT Records#

1 records 588ms

TXT Record
v=spf1 mx a:mail.ringekostskole.dk a:mail.rkrnet.dk a:webmail.rkrnet.dk ip4:87.116.35.131 ip4:185.158.61.72 include:_spf.google.com include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (rkrnet.dk)
-all (hard fail)	v=spf1 mx a:mail.ringekostskole.dk a:mail.rkrnet.dk a:webmail.rkrnet.dk ip4:87.116.35.131 ip4:185.158.61.72 include:_spf.google.com include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.rkrnet.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-12 21:56:30

www	NXDOMAIN
www vs bare domain	Neither resolves rkrnet.dk: no address www.rkrnet.dk: no address
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-rkrnet-dk._domainkey.rkrnetdk.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: 6/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

497ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

0ms

Field	Value
Serial	2026081101
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-12 22:15:12

Field	Value
Registrar	Simply.com A/S
Registered	2000-12-12
Expires	2026-12-31 (74d)

🔗 Same registrant#

4 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
mfkb.dk	Simply.com A/S
ringe-kostskole.dk	Punktum dk A/S (direct)
ringebadmintonclub.dk	Simply.com A/S
ringekostskole.dk	Simply.com A/S

📋 WHOIS#

⏱️ Lookup Timing#

255ms

290ms

251ms

AAAA

248ms

TXT

588ms

CAA

181ms

HTTPS

259ms

TLSA

1112ms

SOA

0ms

MTA-STS

301ms

DNSSEC

497ms

SRV

304ms

Total

5358ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 21:56:30	1013ms	4 NS 0 A 1 MX	🔒 Secure
2026-10-02 04:34:39	1224ms	4 NS 0 A 1 MX	🔒 Secure
2026-10-01 04:31:12	1247ms	4 NS 0 A 1 MX	🔒 Secure
2026-09-28 06:42:18	824ms	4 NS 0 A 1 MX	🔒 Secure
2026-09-02 01:33:31	683ms	4 NS 0 A 1 MX	🔒 Secure
2026-08-27 18:50:41	847ms	4 NS 0 A 1 MX	🔒 Secure
2026-08-12 05:19:45 shown	5358ms	4 NS 0 A 1 MX	🔒 Secure
2026-07-17 04:21:08	1181ms	4 NS 0 A 1 MX	🔒 Secure
2026-06-25 22:02:49	1793ms	4 NS 0 A 1 MX	🔒 Secure
2026-06-20 17:30:33	528ms	4 NS 0 A 1 MX	🔒 Secure
2026-06-17 19:50:17	609ms	4 NS 0 A 1 MX	🔒 Secure