nc3ctf.dk DNS records

🖥️ Nameservers2 records 23ms

Nameserver	IP addresses	PTR	ASN / ISP
clint.ns.cloudflare.com	108.162.193.90 172.64.33.90 173.245.59.90 2606:4700:58::adf5:3b5a 2803:f800:50::6ca2:c15a 2a06:98c1:50::ac40:215a	clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
katelyn.ns.cloudflare.com	108.162.194.235 162.159.38.235 172.64.34.235 2606:4700:50::a29f:26eb 2803:f800:50::6ca2:c2eb 2a06:98c1:50::ac40:22eb	katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com katelyn.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 33ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.58.59	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.168.8	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

🔷 AAAA Records (IPv6)2 records 25ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3036::6815:3a3b	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::ac43:a808	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 25ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.58.59,172.67.168.8 ech=AEX+DQBBvQAgACDtWAvN1eb7hmAIExFDHE2OrFTt16EwrzMI1DHxBK/tTgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:3a3b,2606:4700:3036::ac43:a808

📝 TXT Records1 records 157ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (nc3ctf.dk)
-all (hard fail)	v=spf1 -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)

🔐 DNSSEC100ms

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

🏷️ SOA0ms

Field	Value
Serial	2413703183
Primary NS (MNAME)	clint.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

23ms

A

33ms

MX

28ms

AAAA

25ms

TXT

157ms

CAA

27ms

HTTPS

25ms

TLSA

49ms

SOA

0ms

MTA-STS

40ms

DNSSEC

100ms

SRV

61ms

Total

489ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-01 03:45:36	489ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-27 08:11:11	607ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-26 18:05:47	509ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-04 07:48:05	1813ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-24 01:22:35	1520ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-11 05:52:58	799ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-04 22:13:36	2395ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-06-17 14:39:25	1606ms	2 NS 2 A 0 MX	🔒 Secure	View