simson-it.dk DNS records

🖥️ Nameservers2 records 33ms

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 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
46.30.213.148	—	webcluster1.webpod14-cph3.one.com	AS51468	One.com A/S	46.30.208.0/21	🇩🇰 Denmark	Copenhagen

📧 MX Records2 records 35ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	—	eu-esec-01.heimdalsecurity.com	20.50.183.144 20.50.183.146	eu-esec-01.heimdalsecurity.com eu-esec-01.heimdalsecurity.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation
1	—	eu-esec-02.heimdalsecurity.com	20.50.183.144 20.50.183.146	eu-esec-01.heimdalsecurity.com eu-esec-01.heimdalsecurity.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 40.104.116.40
🔶 Autoconfig	46.30.213.148

🔷 AAAA Records (IPv6)1 records 34ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a02:2350:5:10c:a7:9f15:f040:7a54	—	—	AS51468	One.com A/S	2a02:2350:0:0:0:0:0:0/32	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 269ms

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

📝 TXT Records1 records 2194ms

TXT Record
v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:spf-esec.heimdalsecurity.com -all

✉️ SPF

Policy	Record (simson-it.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:_custspf.one.com include:spf-esec.heimdalsecurity.com -all

📨 DMARC

Policy	Record (_dmarc.simson-it.dk)
p=quarantine	v=DMARC1; p=quarantine; rua=mailto:dmarc@simson-it.dk; ruf=mailto:dmarc@simson-it.dk; rf=afrf; sp=quarantine; fo=1; adkim=r; aspf=r

📬 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 / DANE2 records 300ms

Service / Owner	Type	Cert association
SMTP _25._tcp.eu-esec-01.heimdalsecurity.com	DANE-EE · SPKI · SHA-256	2E8933DD6DB99304A5A9D5C4ECDE7B8E…
SMTP _25._tcp.eu-esec-02.heimdalsecurity.com	DANE-EE · SPKI · SHA-256	2E8933DD6DB99304A5A9D5C4ECDE7B8E…

🔐 DNSSEC117ms

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

🏷️ SOA30ms

Field	Value
Serial	2026042405
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

33ms

A

34ms

MX

35ms

AAAA

34ms

TXT

2194ms

CAA

40ms

HTTPS

33ms

TLSA

300ms

SOA

30ms

MTA-STS

121ms

DNSSEC

117ms

SRV

269ms

Total

2994ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-23 17:11:24	1849ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-25 09:35:26	2726ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-25 07:16:47	773ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 05:34:44	1509ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-18 02:41:26	2994ms	2 NS 1 A 2 MX	🔒 Secure	View