sezer.dk DNS records

🖥️ Nameservers2 records 44ms

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 48ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
136.243.21.239	3600s	s3.moonstar.host	AS24940	Hetzner Online GmbH	136.243.0.0/16	🇩🇪 Germany	Falkenstein

📧 MX Records4 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	10800s	mx1.pub.mailpod12-cph3.one.com	104.37.34.246	mx1.pub.mailpod12-cph3.one.com	AS51468 One.com A/S
10	10800s	mx2.pub.mailpod12-cph3.one.com	104.37.34.247	mx2.pub.mailpod12-cph3.one.com	AS51468 One.com A/S
10	10800s	mx3.pub.mailpod12-cph3.one.com	104.37.34.248	mx3.pub.mailpod12-cph3.one.com	AS51468 One.com A/S
10	10800s	mx4.pub.mailpod12-cph3.one.com	104.37.34.249	mx4.pub.mailpod12-cph3.one.com	AS51468 One.com A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	136.243.21.239
🔶 Autoconfig	136.243.21.239

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 326ms

TXT Record
google-site-verification=SPnp8GHJXl6ukuEXPFSBjpnIFobVCE3U4JbhqLlaALU
v=spf1 +mx +a include:spf.postal.mhost.io include:_custspf.one.com ~all

✉️ SPF

Policy	Record (sezer.dk)
~all (soft fail)	v=spf1 +mx +a include:spf.postal.mhost.io include:_custspf.one.com ~all

📨 DMARC

Policy	Record (_dmarc.sezer.dk)
p=reject	v=DMARC1; p=reject

📬 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 / DANE4 records 222ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.pub.mailpod12-cph3.one.com	DANE-EE · SPKI · SHA-256	3E81C76D10E1A717F28178710EADCAA8…
SMTP _25._tcp.mx2.pub.mailpod12-cph3.one.com	DANE-EE · SPKI · SHA-256	3E81C76D10E1A717F28178710EADCAA8…
SMTP _25._tcp.mx3.pub.mailpod12-cph3.one.com	DANE-EE · SPKI · SHA-256	3E81C76D10E1A717F28178710EADCAA8…
SMTP _25._tcp.mx4.pub.mailpod12-cph3.one.com	DANE-EE · SPKI · SHA-256	3E81C76D10E1A717F28178710EADCAA8…

🔐 DNSSEC91ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081302
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

44ms

A

48ms

MX

39ms

AAAA

34ms

TXT

326ms

CAA

35ms

HTTPS

42ms

TLSA

222ms

SOA

0ms

MTA-STS

80ms

DNSSEC

91ms

SRV

160ms

Total

1185ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 20:35:09	1185ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-08-14 02:10:53	1953ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-08-12 21:02:50	1034ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-26 13:19:49	1509ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-25 15:39:00	952ms	2 NS 1 A 4 MX	🔒 Secure	View
2026-06-23 10:03:49	1170ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 14:37:06	1362ms	2 NS 1 A 4 MX	🔒 Secure	View