dc-system.dk DNS records

🖥️ Nameservers4 records 28ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records1 records 29ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.149.228.17	600s	web07.tigermedia.eu	AS48854	team.blue Denmark A/S	185.149.228.0/24	🇩🇰 Denmark	—

📧 MX Records1 records 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	dcsystem-dk0e.v-v1.mx.microsoft	2a01:111:f403:ca04::5 2a01:111:f403:ca04::d 2a01:111:f403:ca09::7 2a01:111:f403:ca09::b 52.101.68.10 52.101.68.18 52.101.73.12 52.101.73.15	mail-db3pr0202cu00205.inbound.protection.outlook.com mail-db6pr03cu00105.inbound.protection.outlook.com mail-am9pr04cu00107.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-dbbpr03cu00102.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-am4pr0401cu00104.inbound.protection.outlook.com mail-am9pr04cu00107.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
🔶 Autoconfig	185.149.228.17

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 49ms

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

📝 TXT Records1 records 145ms

TXT Record
v=spf1 ip4:185.170.133.74 include:spf.protection.outlook.com include:spf.tigermedia.eu -all

✉️ SPF

Policy	Record (dc-system.dk)
-all (hard fail)	v=spf1 ip4:185.170.133.74 include:spf.protection.outlook.com include:spf.tigermedia.eu -all

📨 DMARC

Policy	Record (_dmarc.dc-system.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc_agg@vali.email;

📬 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 / DANE6 records 78ms

Service / Owner	Type	Cert association
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	6EBFF927297A5B3AAF5EAE672252C36A…
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	C495D9E40F7E625BE22F83CC64305182…
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	5F88694615E4C61686E106B84C3338C6…
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	A6C267923B26A4A9617EDA73D8DB4FBC…
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-TA · Full cert · SHA-256	38D895F5105BC2545822C17A2444F4B0…
SMTP _25._tcp.dcsystem-dk0e.v-v1.mx.microsoft	DANE-EE · SPKI · SHA-256	133086C7B822371A4A3304F1661A7880…

🔐 DNSSEC59ms

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

🏷️ SOA32ms

Field	Value
Serial	2025101400
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

28ms

A

29ms

MX

34ms

AAAA

30ms

TXT

145ms

CAA

31ms

HTTPS

18ms

TLSA

78ms

SOA

32ms

MTA-STS

40ms

DNSSEC

59ms

SRV

49ms

Total

891ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-07-03 08:28:12	891ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-28 08:28:09	963ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-21 13:11:00	707ms	4 NS 1 A 1 MX	🔒 Secure	View
2026-06-17 01:15:48	619ms	4 NS 1 A 1 MX	🔒 Secure	View