vertex.dk DNS records

🖥️ Nameservers2 records 24ms

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 29ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
128.76.131.206	43200s	128-76-131-206-static.dk.customer.tdc.net	AS3292	TDC Holding A/S	128.76.128.0/17	🇩🇰 Denmark	Vejle

📧 MX Records2 records 29ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	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	3600s	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	vertex.dk → 128.76.131.206
🔶 Autoconfig	vertex.dk → 128.76.131.206

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records2 records 121ms

TXT Record
protonmail-verification=379bb6743a6832fb71179b6495bda84b6a680692
v=spf1 include:_spf.protonmail.ch include:_custspf.one.com mx ~all

✉️ SPF

Policy	Record (vertex.dk)
~all (soft fail)	v=spf1 include:_spf.protonmail.ch include:_custspf.one.com mx ~all

📨 DMARC

Policy	Record (_dmarc.vertex.dk)
p=none (monitor only)	v=DMARC1; p=none

📬 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.vertex.dk	vertex.dk
TXT	vertex.dk	protonmail-verification=379bb6743a6832fb71179b6495bda84b6a680692

🔗 TLSA / DANE4 records 154ms

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	76BB66711DA416433CA890A5B2E5A053…
SMTP _25._tcp.mailsec.protonmail.ch	DANE-EE · SPKI · SHA-256	6111A5698D23C89E09C36FF833C1487E…

🔐 DNSSEC98ms

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

🏷️ SOA0ms

Field	Value
Serial	2026082901
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

24ms

A

29ms

MX

29ms

AAAA

33ms

TXT

121ms

CAA

30ms

HTTPS

29ms

TLSA

154ms

SOA

0ms

MTA-STS

42ms

DNSSEC

98ms

SRV

39ms

Total

755ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-30 13:09:14	755ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-07 09:47:03	1605ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-30 12:54:21	729ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-26 18:41:49	1212ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-24 23:11:24	2337ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-24 12:03:16	1149ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-24 11:20:24	1006ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 22:12:07	939ms	2 NS 1 A 2 MX	🔒 Secure	View