nikolajholck.dk DNS records

🖥️ Nameservers2 records 62ms

Nameserver	IP addresses	PTR	ASN / ISP
elle.ns.cloudflare.com	108.162.192.110 172.64.32.110 173.245.58.110 2606:4700:50::adf5:3a6e 2803:f800:50::6ca2:c06e 2a06:98c1:50::ac40:206e	elle.ns.cloudflare.com elle.ns.cloudflare.com elle.ns.cloudflare.com elle.ns.cloudflare.com elle.ns.cloudflare.com elle.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
todd.ns.cloudflare.com	108.162.193.146 172.64.33.146 173.245.59.146 2606:4700:58::adf5:3b92 2803:f800:50::6ca2:c192 2a06:98c1:50::ac40:2192	todd.ns.cloudflare.com todd.ns.cloudflare.com todd.ns.cloudflare.com todd.ns.cloudflare.com todd.ns.cloudflare.com todd.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records1 records 70ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
88.218.3.190	60s	—	AS9009	M247 Europe SRL	88.218.0.0/22	🇩🇰 Denmark	Copenhagen

📧 MX Records2 records 56ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	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	300s	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)1 records 87ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a0d:5600:1a:26::2	60s	—	AS9009	M247 Europe SRL	2a0d:5600:1a:0:0:0:0:0/47	🇩🇰 Denmark	Copenhagen

🔐 HTTPS Records1 records 66ms

Priority	Target	SvcParams
1 service	.	alpn="h2,http/1.1" ipv4hint=88.218.3.190 ipv6hint=2a0d:5600:1a:26::2

📝 TXT Records2 records 262ms

TXT Record
protonmail-verification=0b63f9ee8a77346f7c6ab1637dca785026fcc8c6
v=spf1 include:_spf.protonmail.ch ~all

✉️ SPF

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

📨 DMARC

Policy	Record (_dmarc.nikolajholck.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 161ms

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…

🔐 DNSSEC141ms

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

🏷️ SOA0ms

Field	Value
Serial	2410632493
Primary NS (MNAME)	elle.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

62ms

A

70ms

MX

56ms

AAAA

87ms

TXT

262ms

CAA

64ms

HTTPS

66ms

TLSA

161ms

SOA

0ms

MTA-STS

130ms

DNSSEC

141ms

SRV

109ms

Total

1226ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 04:38:13	1226ms	2 NS 1 A 2 MX	🔓 Insecure	View
2026-08-25 11:02:48	1011ms	2 NS 1 A 2 MX	🔓 Insecure	View
2026-07-27 15:54:37	1347ms	2 NS 1 A 2 MX	❓ Unknown	View
2026-07-24 13:37:53	10681ms	2 NS 1 A 2 MX	🔓 Insecure	View
2026-07-23 10:29:54	2131ms	2 NS 2 A 2 MX	🔓 Insecure	View
2026-06-24 17:55:49	514ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 12:23:04	1003ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-17 13:19:56	2574ms	2 NS 1 A 2 MX	🔒 Secure	View