ndb.dk DNS records

🖥️ Nameservers2 records 117ms

Nameserver	IP addresses	PTR	ASN / ISP
colette.ns.cloudflare.com	108.162.194.28 162.159.38.28 172.64.34.28 2606:4700:50::a29f:261c 2803:f800:50::6ca2:c21c 2a06:98c1:50::ac40:221c	colette.ns.cloudflare.com colette.ns.cloudflare.com colette.ns.cloudflare.com colette.ns.cloudflare.com colette.ns.cloudflare.com colette.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
otto.ns.cloudflare.com	108.162.195.135 162.159.44.135 172.64.35.135 2606:4700:58::a29f:2c87 2803:f800:50::6ca2:c387 2a06:98c1:50::ac40:2387	otto.ns.cloudflare.com otto.ns.cloudflare.com otto.ns.cloudflare.com otto.ns.cloudflare.com otto.ns.cloudflare.com otto.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 124ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.96.44	—	—	AS13335	—	—	—	—
172.67.173.1	—	—	AS13335	—	—	—	—

📧 MX Records2 records 135ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	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	—	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

🔷 AAAA Records (IPv6)2 records 115ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:602c	—	—	AS13335	—	—	—	—
2606:4700:3037::ac43:ad01	—	—	AS13335	—	—	—	—

🔐 HTTPS Records1 records 118ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.96.44,172.67.173.1 ech=AEX+DQBBHQAgACDvr0foaUL+kfe8cQ/jzRqJm9WG78Sy1RChao5wzEe6ewAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:602c,2606:4700:3037::ac43:ad01

📝 TXT Records2 records 199ms

TXT Record
protonmail-verification=b50e27f388e98b02f1989abeb14680469868121f
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.ndb.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 705ms

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

🔐 DNSSEC187ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA114ms

Field	Value
Serial	2404301289
Primary NS (MNAME)	colette.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

117ms

A

124ms

MX

135ms

AAAA

115ms

TXT

199ms

CAA

120ms

HTTPS

118ms

TLSA

705ms

SOA

114ms

MTA-STS

117ms

DNSSEC

187ms

SRV

128ms

Total

2152ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 16:06:57	960ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-08-25 07:29:35	10729ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-07-15 21:34:50	1842ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-28 17:44:39	2109ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-22 10:22:41	968ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-18 04:42:27	2152ms	2 NS 2 A 2 MX	🔓 Insecure	View