nc3ctf.dk

📜 Historical scan 2026-09-29 14:49:34 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

nc3ctf.dk is a .dk domain served by 2 nameservers (clint.ns.cloudflare.com, katelyn.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.58.59 is hosted by Cloudflare, Inc. (AS13335). The zone is DNSSEC-signed and validates, 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 47ms

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 Records#

2 records 68ms

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 31ms

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 Records#

1 records 32ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.58.59,172.67.168.8 ech=AEX+DQBBUQAgACD446XKJHUQv7GtBD/n2zJ9KlaVE4jNnjpfFCX9w7/GRgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:3a3b,2606:4700:3036::ac43:a808

📝 TXT Records#

1 records 298ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-14 00:03:56

www	104.21.58.59 172.67.168.8 2606:4700:3036::6815:3a3b 2606:4700:3036::ac43:a808 (AS13335) (address records, no CNAME)
www vs bare domain	Same network nc3ctf.dk: 104.21.58.59 172.67.168.8 2606:4700:3036::6815:3a3b 2606:4700:3036::ac43:a808 (AS13335) www.nc3ctf.dk: 104.21.58.59 172.67.168.8 2606:4700:3036::6815:3a3b 2606:4700:3036::ac43:a808 (AS13335)
Wildcard	No
Denial of existence	Compact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 0/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

73ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415484933
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 yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

47ms

68ms

38ms

AAAA

31ms

TXT

298ms

CAA

58ms

HTTPS

32ms

TLSA

92ms

SOA

0ms

MTA-STS

53ms

DNSSEC

73ms

SRV

99ms

Total

1381ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 00:03:56	2743ms	2 NS 2 A 0 MX	🔒 Secure
2026-10-08 11:01:20	492ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-29 14:49:34 shown	1381ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-23 23:56:25	1073ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-21 05:13:58	633ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-04 15:27:54	972ms	2 NS 2 A 0 MX	🔒 Secure
2026-09-01 03:45:36	489ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-27 08:11:11	607ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-26 18:05:47	509ms	2 NS 2 A 0 MX	🔒 Secure
2026-08-04 07:48:05	1813ms	2 NS 2 A 0 MX	🔒 Secure
2026-07-24 01:22:35	1520ms	2 NS 2 A 0 MX	🔒 Secure
2026-07-11 05:52:58	799ms	2 NS 2 A 0 MX	🔒 Secure
2026-07-04 22:13:36	2395ms	2 NS 2 A 0 MX	🔒 Secure
2026-06-17 14:39:25	1606ms	2 NS 2 A 0 MX	🔒 Secure