nrf.dk

📜 Historical scan 2026-06-17 14:22:25 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

nrf.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.40.12 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by nrf-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 50ms

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 50ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.12	—	prolinux100.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
10	—	nrf-dk.mail.protection.outlook.com	2a01:111:f403:ca04:: 2a01:111:f403:ca04::7 2a01:111:f403:ca04::f 2a01:111:f403:ca09::6 52.101.68.12 52.101.73.1 52.101.73.22 52.101.73.30	mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am4pr0401cu00106.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-am7pr05cu00106.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 200ms

TXT Record
tmes=03cb7f2c21b104f99829b65ea5bcaece
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (nrf.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.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 2026-10-08 12:07:36

www	185.21.40.12 (AS48854) (address records, no CNAME)
www vs bare domain	Same network nrf.dk: 185.21.40.12 (AS48854) www.nrf.dk: 185.21.40.12 (AS48854)
Wildcard	Yes: any name under the zone resolves
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-nrf-dk._domainkey.nrfdk.onmicrosoft.com	RSA · ~2048 bit
selector2	selector2-nrf-dk._domainkey.nrfdk.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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

155ms

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

🏷️ SOA#

45ms

Field	Value
Serial	2026060801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

50ms

46ms

AAAA

51ms

TXT

200ms

CAA

49ms

HTTPS

55ms

TLSA

221ms

SOA

45ms

MTA-STS

54ms

DNSSEC

155ms

SRV

0ms

Total

1743ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-08 12:07:36	1319ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-06 16:39:31	1234ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-10 09:48:29	10201ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-08 19:39:36	1823ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 22:47:31	4831ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-30 17:33:53	1178ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-24 20:04:44	3561ms	2 NS 1 A 1 MX	⚠️ Bogus
2026-06-22 23:46:22	1111ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 19:03:56	1264ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 14:22:25 shown	1743ms	2 NS 1 A 1 MX	🔒 Secure