clt.dk DNS records

🖥️ Nameservers2 records 35ms

Nameserver	IP addresses	PTR	ASN / ISP
cris.ns.cloudflare.com	108.162.195.202 162.159.44.202 172.64.35.202 2606:4700:58::a29f:2cca 2803:f800:50::6ca2:c3ca 2a06:98c1:50::ac40:23ca	cris.ns.cloudflare.com cris.ns.cloudflare.com cris.ns.cloudflare.com cris.ns.cloudflare.com cris.ns.cloudflare.com cris.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
liberty.ns.cloudflare.com	108.162.194.240 162.159.38.240 172.64.34.240 2606:4700:50::a29f:26f0 2803:f800:50::6ca2:c2f0 2a06:98c1:50::ac40:22f0	liberty.ns.cloudflare.com liberty.ns.cloudflare.com liberty.ns.cloudflare.com liberty.ns.cloudflare.com liberty.ns.cloudflare.com liberty.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records1 records 33ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
188.228.89.108	60s	188.228.89.108.dynamic.altibox.net	AS214875	Altibox Danmark AS	188.228.88.0/22	🇩🇰 Denmark	Holstebro

📧 MX Records2 records 29ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	60s	mail.clt.dk	188.228.89.108	188.228.89.108.dynamic.altibox.net	AS214875 Altibox Danmark AS
20	60s	mxbackup.gratisdns.dk	—	—	—

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	clt.dk → 188.228.89.108
🔶 Autoconfig	clt.dk → 188.228.89.108

🔷 AAAA Records (IPv6)

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records1 records 61ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	20	443	mail.clt.dk

📝 TXT Records2 records 150ms

TXT Record
google-site-verification=RmOTO6K11ZYc0TiusBryuxApH9DaQJAAT1aOAGkh5lw
v=spf1 ip4:188.228.89.108 ~all

✉️ SPF

Policy	Record (clt.dk)
~all (soft fail)	v=spf1 ip4:188.228.89.108 ~all

📨 DMARC

Policy	Record (_dmarc.clt.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:claus+aggr@clt.dk; ruf=mailto:claus+forensic@clt.dk; adkim=r; aspf=r; pct=100; rf=afrf; sp=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
TXT	_acme-challenge.clt.dk	MpCkBUcfU8yybbcn0YNLFJYAXwdLqfTj5Q02yE50wII

🔗 TLSA / DANE

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

🔐 DNSSEC104ms

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

🏷️ SOA0ms

Field	Value
Serial	2413236547
Primary NS (MNAME)	cris.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

35ms

A

33ms

MX

29ms

AAAA

32ms

TXT

150ms

CAA

36ms

HTTPS

55ms

TLSA

1275ms

SOA

0ms

MTA-STS

48ms

DNSSEC

104ms

SRV

61ms

Total

1782ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 10:36:07	1782ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-16 07:11:56	4898ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-08-03 11:58:16	1277ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-29 11:58:17	2937ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-09 21:21:36	9221ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-07-03 05:48:44	1137ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-26 09:12:24	3008ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-25 00:27:47	973ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-24 02:13:34	1194ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-22 02:06:00	580ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-21 03:36:09	1050ms	2 NS 1 A 2 MX	🔒 Secure	View
2026-06-16 21:25:39	2587ms	2 NS 1 A 2 MX	🔒 Secure	View