nrf.dk DNS records

🖥️ Nameservers2 records 90ms

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 Records1 records 72ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.40.12	3600s	prolinux100.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records1 records 92ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	nrf-dk.mail.protection.outlook.com	2a01:111:f403:ca09:: 2a01:111:f403:ca09::b 2a01:111:f403:ca09::e 2a01:111:f403:ca09::f 52.101.68.0 52.101.68.39 52.101.73.2 52.101.73.22	mail-am3pr04cu00500.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-am7pr05cu00206.inbound.protection.outlook.com mail-am7pr05cu00307.inbound.protection.outlook.com mail-db3pr0202cu00100.inbound.protection.outlook.com mail-db7pr03cu00607.inbound.protection.outlook.com mail-as9pr07cu00302.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 → 40.98.16.8
🔶 Autoconfig	autodiscover.outlook.com → 52.97.179.200

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 8088ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	0	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 255ms

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

🔏 ACME Challenge

Type	Name	Value
CNAME	_acme-challenge.nrf.dk	autodiscover.outlook.com

🔗 TLSA / DANE

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

🔐 DNSSEC202ms

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

🏷️ SOA0ms

Field	Value
Serial	2026080701
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 — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

90ms

A

72ms

MX

92ms

AAAA

72ms

TXT

255ms

CAA

83ms

HTTPS

85ms

TLSA

1212ms

SOA

0ms

MTA-STS

153ms

DNSSEC

202ms

SRV

8088ms

Total

10201ms

🕐 Scan History

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