rsedk.dk

📜 Historical scan 2026-06-25 16:34:00 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rsedk.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 2 January 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.41.98 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by rsedk-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 42ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.41.98	600s	linux26.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	3600s	rsedk-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::7 2a01:111:f403:ca04::b 2a01:111:f403:ca09::d 52.101.73.16 52.101.73.24 52.101.73.28 52.101.73.30	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-as9pr05cu01305.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-as8pr05cu00300.inbound.protection.outlook.com mail-am7pr05cu00204.inbound.protection.outlook.com mail-am7pr05cu00306.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 → 52.98.149.152
🔶 Autoconfig	185.21.41.98

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 164ms

TXT Record
MS=ms40288507
v=spf1 include:spf.curanet.dk include:spf.protection.outlook.com include:_custspf.one.com -all

✉️ SPF#

Policy	Record (rsedk.dk)
-all (hard fail)	v=spf1 include:spf.curanet.dk include:spf.protection.outlook.com include:_custspf.one.com -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 2026-10-13 09:21:25

www	185.21.41.98 (AS48854) (address records, no CNAME)
www vs bare domain	Same network rsedk.dk: 185.21.41.98 (AS48854) www.rsedk.dk: 185.21.41.98 (AS48854)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-rsedk-dk._domainkey.renewablesystemsengineering.onmicrosoft.com	RSA · ~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: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

111ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026061901
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-13 09:42:18

Field	Value
Registrar	ONE.COM A/S
Registered	2025-01-02
Expires	2027-01-01 (75d)

🔗 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#

33ms

42ms

46ms

AAAA

31ms

TXT

164ms

CAA

35ms

HTTPS

37ms

TLSA

472ms

SOA

0ms

MTA-STS

46ms

DNSSEC

111ms

SRV

71ms

Total

1091ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 09:21:25	1224ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-30 16:39:26	748ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-27 07:29:30	2755ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-14 01:14:22	1328ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 21:36:49	3369ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-15 02:40:10	3240ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-13 23:19:03	1800ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-17 19:49:08	5331ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-15 22:29:19	1079ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-25 16:34:00 shown	1091ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 12:55:43	2716ms	2 NS 1 A 1 MX	🔒 Secure