aarhus-ctf.dk DNS records

🖥️ Nameservers2 records 45ms

Nameserver	IP addresses	PTR	ASN / ISP
brenda.ns.cloudflare.com	108.162.192.77 172.64.32.77 173.245.58.77 2606:4700:50::adf5:3a4d 2803:f800:50::6ca2:c04d 2a06:98c1:50::ac40:204d	brenda.ns.cloudflare.com brenda.ns.cloudflare.com brenda.ns.cloudflare.com brenda.ns.cloudflare.com brenda.ns.cloudflare.com brenda.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
randy.ns.cloudflare.com	108.162.195.109 162.159.44.109 172.64.35.109 2606:4700:58::a29f:2c6d 2803:f800:50::6ca2:c36d 2a06:98c1:50::ac40:236d	randy.ns.cloudflare.com randy.ns.cloudflare.com randy.ns.cloudflare.com randy.ns.cloudflare.com randy.ns.cloudflare.com randy.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 38ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.74.121	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.158.91	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	172.67.158.91
🔶 Autoconfig	172.67.158.91

🔷 AAAA Records (IPv6)2 records 39ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:4a79	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::ac43:9e5b	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 44ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.74.121,172.67.158.91 ech=AEX+DQBB0wAgACBk5n1x0V/k4OK1A3MsDujzmtSx40t+FWWTeBCaJDc9CgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:4a79,2606:4700:3036::ac43:9e5b

📝 TXT Records2 records 186ms

TXT Record
v=DMARC1; p=quarantine; rua=mailto:dmarc@mdevelopment.dk;
v=spf1 +a +mx +include:spf.azehosting.net +include:servers.mcsv.net -all

✉️ SPF

Policy	Record (aarhus-ctf.dk)
-all (hard fail)	v=spf1 +a +mx +include:spf.azehosting.net +include:servers.mcsv.net -all

📨 DMARC

✗ No DMARC record — mail spoofing not restricted

📬 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)

🔐 DNSSEC120ms

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	2410418463
Primary NS (MNAME)	brenda.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

45ms

A

38ms

MX

44ms

AAAA

39ms

TXT

186ms

CAA

39ms

HTTPS

44ms

TLSA

93ms

SOA

0ms

MTA-STS

76ms

DNSSEC

120ms

SRV

78ms

Total

806ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-07-25 20:30:58	806ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-07-16 19:39:53	743ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-07-01 07:29:22	844ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-19 22:46:24	5376ms	2 NS 2 A 0 MX	🔓 Insecure	View
2026-06-16 13:16:08	477ms	2 NS 2 A 0 MX	🔓 Insecure	View