duos.dk DNS records

🖥️ Nameservers2 records 130ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.scannet2.dk	185.25.141.9 2a02:2339:4006:10d::4171:4171	ns1.scannet.dk ns1.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.scannet2.dk	2a02:2339:1:112:0:5:1:b11 91.197.248.72	ns2.scannet.dk ns2.scannet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records1 records 136ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
87.116.13.122	600s	s6.stom.dk	AS31027	GlobalConnect A/S	87.116.0.0/18	🇩🇰 Denmark	—

📧 MX Records3 records 141ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1-dk.centerasecurity.dk	128.76.60.167 128.76.60.187 89.233.19.127 89.233.19.127 89.233.19.188 89.233.19.188	mx6.centerasecurity.dk mx6.centerasecurity.dk 127.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 188.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S
10	3600s	mx2-dk.centerasecurity.dk	128.76.60.168 128.76.60.169 89.233.19.128 89.233.19.128 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk mx6.centerasecurity.dk 128.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S
20	3600s	mx3-dk.centerasecurity.dk	128.76.60.187 89.233.19.129 89.233.19.129	mx6.centerasecurity.dk 129.0-254.19.233.89.in-addr.arpa mx14.centerasecurity.dk	AS3292 TDC Holding A/S AS3308 Norlys Digital A/S AS3308 Norlys Digital A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.97.188.72
🔶 Autoconfig	duos.dk → 87.116.13.122

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 419ms

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

📝 TXT Records7 records 409ms

TXT Record
apple-domain-verification=UixNMtD5hvfLc0J1
docusign=849519c6-3094-4302-8e00-a61049335bd2
MS=ms82996542
pardot1062442=404507a121f3b90609a1f682c19ec3e1cfc532b4e742e283dc859fe738336c2d
sending_domain1062442=36afd0289a439331f3ebc527514fbbef3b3704057ad18f1df312a97e648741e5
teamviewer-sso-verification=54e0d38f1c7e48fbbdda36508c55d3ce
v=spf1 include:_spf73220.spf-protect.dk -all

✉️ SPF

Policy	Record (duos.dk)
-all (hard fail)	v=spf1 include:_spf73220.spf-protect.dk -all

📨 DMARC

Policy	Record (_dmarc.duos.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:685bf46bcddb0@dmarc-dk.centerasecurity.com; ruf=mailto:tdj@duos.dk

📬 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.duos.dk	duos.dk
TXT	duos.dk	apple-domain-verification=UixNMtD5hvfLc0J1
TXT	duos.dk	docusign=849519c6-3094-4302-8e00-a61049335bd2
TXT	duos.dk	teamviewer-sso-verification=54e0d38f1c7e48fbbdda36508c55d3ce

🔗 TLSA / DANE6 records 68ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx1-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…
SMTP _25._tcp.mx2-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	D4C349E7B72F5CF4A9CEA358F98947C2…
SMTP _25._tcp.mx3-dk.centerasecurity.dk	DANE-EE · SPKI · SHA-256	56315B43B892E9AEE184919EC6A5821C…

🔐 DNSSEC201ms

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

🏷️ SOA136ms

Field	Value
Serial	2026061204
Primary NS (MNAME)	ns.scannet2.dk
Responsible (RNAME)	hostmaster@scannet.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

130ms

A

136ms

MX

141ms

AAAA

120ms

TXT

409ms

CAA

118ms

HTTPS

120ms

TLSA

68ms

SOA

136ms

MTA-STS

132ms

DNSSEC

201ms

SRV

419ms

Total

1104ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-06-23 08:33:07	1104ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-21 05:59:41	1166ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-19 23:36:00	1382ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 05:09:41	29525ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 05:06:17	758ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 05:03:47	3246ms	2 NS 1 A 3 MX	🔒 Secure	View
2026-06-17 05:00:58	2947ms	2 NS 1 A 3 MX	🔒 Secure	View