aarhus-ctf.dk

📜 Historical scan 2026-09-25 19:10:46 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

aarhus-ctf.dk is a .dk domain served by 2 nameservers (brenda.ns.cloudflare.com, randy.ns.cloudflare.com). It was registered on 26 February 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.74.121 is hosted by Cloudflare, Inc. (AS13335). The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 32ms

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 Records#

2 records 64ms

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	104.21.74.121
🔶 Autoconfig	172.67.158.91

🔷 AAAA Records (IPv6)#

2 records 51ms

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 Records#

1 records 58ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.74.121,172.67.158.91 ech=AEX+DQBBRwAgACBvrwcnkCG0ntVo4fE3le0rQsV9Zw0+6E+Ny5t5SROLNwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:4a79,2606:4700:3036::ac43:9e5b

📝 TXT Records#

2 records 399ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 01:23:14

www	104.21.74.121 172.67.158.91 2606:4700:3031::6815:4a79 2606:4700:3036::ac43:9e5b (AS13335) (address records, no CNAME)
www vs bare domain	Same network aarhus-ctf.dk: 104.21.74.121 172.67.158.91 2606:4700:3031::6815:4a79 2606:4700:3036::ac43:9e5b (AS13335) www.aarhus-ctf.dk: 104.21.74.121 172.67.158.91 2606:4700:3031::6815:4a79 2606:4700:3036::ac43:9e5b (AS13335)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

9075ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415654343
Primary NS (MNAME)	brenda.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-15 23:49:38

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-02-26
Expires	2027-02-28 (134d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
domaenehajen.dk	Domænehajen ApS
ufsf.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

32ms

64ms

56ms

AAAA

51ms

TXT

399ms

CAA

68ms

HTTPS

58ms

TLSA

97ms

SOA

0ms

MTA-STS

101ms

DNSSEC

9075ms

SRV

119ms

Total

10916ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 19:59:28	533ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-25 19:10:46 shown	10916ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-24 12:54:29	607ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-09 07:50:43	3005ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-03 04:50:32	1256ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-25 20:30:58	806ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-16 19:39:53	743ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-01 07:29:22	844ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-19 22:46:24	5376ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-16 13:16:08	477ms	2 NS 2 A 0 MX	🔓 Insecure