rtc.dk DNS records

🖥️ Nameservers2 records 30ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records1 records 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.104.202.84	3600s	—	AS50346	It Forum Gruppen A/s	193.104.202.0/24	🇩🇰 Denmark	Virum

📧 MX Records1 records 26ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	360s	rtc-dk.mail.protection.outlook.com	2a01:111:f403:ca04::4 2a01:111:f403:ca04::a 2a01:111:f403:ca04::c 2a01:111:f403:ca09::8 52.101.68.15 52.101.68.25 52.101.73.19 52.101.73.8	mail-db4pr02cu00204.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-db9pr02cu00204.inbound.protection.outlook.com mail-as2pr05cu00100.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db8pr02cu00101.inbound.protection.outlook.com mail-as8pr04cu00803.inbound.protection.outlook.com mail-am0pr04cu00500.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 → 40.104.116.8

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records2 records 32ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	ssl2.itsecurity.dk
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 124ms

TXT Record
MS=ms53561151
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF

Policy	Record (rtc.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

🔗 TLSA / DANE

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

🔐 DNSSEC55ms

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

🏷️ SOA27ms

Field	Value
Serial	2021111701
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

30ms

A

38ms

MX

26ms

AAAA

29ms

TXT

124ms

CAA

44ms

HTTPS

29ms

TLSA

473ms

SOA

27ms

MTA-STS

32ms

DNSSEC

55ms

SRV

32ms

Total

1001ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-06-28 11:06:27	1001ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-28 07:37:42	1924ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-23 23:54:41	1094ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-18 03:15:40	765ms	2 NS 1 A 1 MX	🔒 Secure	View
2026-06-18 02:54:02	1192ms	2 NS 1 A 1 MX	🔒 Secure	View