hzb.dk DNS records

🖥️ Nameservers2 records 241ms

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 211ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
81.27.222.45	900s	d81-27-222-45cm.dcmediahosting.com	AS42525	GlobalConnect A/S	81.27.208.0/20	🇩🇰 Denmark	Odense

📧 MX Records2 records 224ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	600s	mail.protonmail.ch	176.119.200.128 185.205.70.128 185.70.42.128	mail.protonmail.ch mail.protonmail.ch mail.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG
20	600s	mailsec.protonmail.ch	176.119.200.129 185.205.70.129 185.70.42.129	mailsec.protonmail.ch mailsec.protonmail.ch mailsec.protonmail.ch	AS62371 Proton AG AS62371 Proton AG AS62371 Proton AG

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	81.27.222.45
🔶 Autoconfig	81.27.222.45

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 481ms

TXT Record
protonmail-verification=c47f2e765dcb8db96cca33bd308f7b83fbbf3579
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF

Policy	Record (hzb.dk)
~all (soft fail)	v=spf1 include:_spf.protonmail.ch ~all

📨 DMARC

Policy	Record (_dmarc.hzb.dk)
p=quarantine	v=DMARC1; p=quarantine

📬 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 459ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mail.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	76BB66711DA416433CA890A5B2E5A053…

🔐 DNSSEC357ms

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

🏷️ SOA0ms

Field	Value
Serial	2026081101
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

241ms

A

211ms

MX

224ms

AAAA

240ms

TXT

481ms

CAA

251ms

HTTPS

251ms

TLSA

459ms

SOA

0ms

MTA-STS

280ms

DNSSEC

357ms

SRV

286ms

Total

2946ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-11 17:24:05	2946ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-09 03:42:12	5178ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-23 13:27:01	5100ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-19 06:01:21	5053ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-18 05:29:41	2416ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-12 18:54:17	1459ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-17 14:13:35	745ms	2 NS 1 A 2 MX	🔒 Secure	View