rt.dk DNS records

🖥️ Nameservers2 records 91ms

Nameserver	IP addresses	PTR	ASN / ISP
primary.infoserv.dk	139.162.157.8 2a01:7e01::f03c:91ff:fe59:943d	mail2.ishost.dk —	AS63949 Akamai Connected Cloud AS63949 Akamai Connected Cloud
secondary.infoserv.dk	139.162.227.162 2a01:7e00::f03c:92ff:fe07:7dc2	li1512-162.members.linode.com —	AS63949 Akamai Connected Cloud AS63949 Akamai Connected Cloud

🌍 A Records1 records 98ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.19.154.92	600s	—	AS13335	Cloudflare, Inc.	104.16.0.0/14	—	—

📧 MX Records1 records 81ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	300s	rt-dk.mail.protection.outlook.com	2a01:111:f403:ca04::8 2a01:111:f403:ca09:: 2a01:111:f403:ca09::1 2a01:111:f403:ca09::28 52.101.73.1 52.101.73.12 52.101.73.30 52.101.73.8	mail-db5pr02cu00100.inbound.protection.outlook.com mail-am3pr04cu00500.inbound.protection.outlook.com mail-as9pr07cu00301.inbound.protection.outlook.com mail-am6pr02cu00300.inbound.protection.outlook.com mail-am3pr04cu00501.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am7pr05cu00306.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 → 40.104.116.40

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 155ms

Service	Priority	Weight	Port	Target
_sipfederationtls._tcp	100	1	5061	sipfed.online.lync.com

📝 TXT Records2 records 467ms

TXT Record
MS=ms28078545
v=spf1 ip4:92.241.223.205 ip4:86.52.51.215 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:send.heyloyalty.com -all

✉️ SPF

Policy	Record (rt.dk)
-all (hard fail)	v=spf1 ip4:92.241.223.205 ip4:86.52.51.215 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:send.heyloyalty.com -all

📨 DMARC

Policy	Record (_dmarc.rt.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc@rt.dk; adkim=s; aspf=s;

📬 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)

🔐 DNSSEC123ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2026062325
Primary NS (MNAME)	primary.infoserv.dk
Responsible (RNAME)	admin@infoserv
Refresh	900s
Retry	300s
Expire	3600s
Minimum (neg-cache TTL)	900s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

91ms

A

98ms

MX

81ms

AAAA

83ms

TXT

467ms

CAA

73ms

HTTPS

65ms

TLSA

380ms

SOA

0ms

MTA-STS

131ms

DNSSEC

123ms

SRV

155ms

Total

1398ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 04:28:32	1398ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-08-26 13:03:52	10172ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-07-03 09:06:27	1570ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-28 09:06:24	1350ms	2 NS 1 A 1 MX	🔓 Insecure	View
2026-06-17 19:53:02	2114ms	2 NS 1 A 1 MX	🔓 Insecure	View