ack.dk DNS records

🖥️ Nameservers2 records 42ms

Nameserver	IP addresses	PTR	ASN / ISP
duke.ns.cloudflare.com	108.162.193.110 172.64.33.110 173.245.59.110 2606:4700:58::adf5:3b6e 2803:f800:50::6ca2:c16e 2a06:98c1:50::ac40:216e	duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com duke.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kiki.ns.cloudflare.com	108.162.192.180 172.64.32.180 173.245.58.180 2606:4700:50::adf5:3ab4 2803:f800:50::6ca2:c0b4 2a06:98c1:50::ac40:20b4	kiki.ns.cloudflare.com kiki.ns.cloudflare.com kiki.ns.cloudflare.com kiki.ns.cloudflare.com kiki.ns.cloudflare.com kiki.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.30.245	600s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.174.54	600s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)2 records 30ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:1ef5	600s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:ae36	600s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 39ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.30.245,172.67.174.54 ech=AEX+DQBBqAAgACBXOJXW/N1m3KFeIRnNy+b9QFalTJNKelj6NaMpySOtUwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:1ef5,2606:4700:3037::ac43:ae36

📝 TXT Records1 records 174ms

TXT Record
v=spf1 mx a ip4:84.19.174.8 ~all

✉️ SPF

Policy	Record (ack.dk)
~all (soft fail)	v=spf1 mx a ip4:84.19.174.8 ~all

📨 DMARC

Policy	Record (_dmarc.ack.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:martin@zakobo.dk; ruf=mailto:martin@zakobo.dk; fo=0:1:d:s; adkim=s; aspf=s

📬 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 / DANE

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC68ms

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

🏷️ SOA51ms

Field	Value
Serial	2402947878
Primary NS (MNAME)	duke.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

42ms

A

34ms

MX

37ms

AAAA

30ms

TXT

174ms

CAA

43ms

HTTPS

39ms

TLSA

67ms

SOA

51ms

MTA-STS

39ms

DNSSEC

68ms

SRV

59ms

Total

498ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-28 09:41:21	913ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-28 09:41:11	3651ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-21 12:55:55	3527ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-07-25 04:49:49	720ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-24 18:40:46	849ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-22 01:05:01	498ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-16 12:37:27	488ms	2 NS 2 A 0 MX	🔓 Insecure	View