21blackjack.dk

📜 Historical scan 2026-08-17 22:14:22 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

21blackjack.dk is a .dk domain served by 2 nameservers (adel.ns.cloudflare.com, vick.ns.cloudflare.com). It was registered on 10 August 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.1.65 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 53ms

Nameserver	IP addresses	PTR	ASN / ISP
adel.ns.cloudflare.com	108.162.192.55 172.64.32.55 173.245.58.55 2606:4700:50::adf5:3a37 2803:f800:50::6ca2:c037 2a06:98c1:50::ac40:2037	adel.ns.cloudflare.com adel.ns.cloudflare.com adel.ns.cloudflare.com adel.ns.cloudflare.com adel.ns.cloudflare.com adel.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
vick.ns.cloudflare.com	108.162.193.244 172.64.33.244 173.245.59.244 2606:4700:58::adf5:3bf4 2803:f800:50::6ca2:c1f4 2a06:98c1:50::ac40:21f4	vick.ns.cloudflare.com vick.ns.cloudflare.com vick.ns.cloudflare.com vick.ns.cloudflare.com vick.ns.cloudflare.com vick.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 53ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.1.65	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.128.188	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 45ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:141	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::ac43:80bc	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 49ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.1.65,172.67.128.188 ech=AEX+DQBBiQAgACDZFpSdgVRklsjsUldURwpFRfq3rDvLsEcsRm+VBKrKQQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:141,2606:4700:3035::ac43:80bc

📝 TXT Records#

📝

No TXT records found

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-19 08:14:27

www	104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (AS13335) (address records, no CNAME)
www vs bare domain	Same network 21blackjack.dk: 104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (AS13335) www.21blackjack.dk: 104.21.1.65 172.67.128.188 2606:4700:3031::6815:141 2606:4700:3035::ac43:80bc (AS13335)
Wildcard	No

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.21blackjack.dk	AakJdweh8_uOj7Vv-oq6Ye_kHvd4bsI73Vw08M8IYYo
TXT	_acme-challenge.21blackjack.dk	vmvHIOuSxIWdAygj_Aq-TTycAva17T8Uxe8CaxCjksU

🔗 TLSA / DANE#

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

🔐 DNSSEC#

107ms

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	2412420238
Primary NS (MNAME)	adel.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-18 07:59:05

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2023-08-10
Expires	2027-08-09 (290d)

📋 WHOIS#

⏱️ Lookup Timing#

53ms

38ms

AAAA

45ms

TXT

221ms

CAA

35ms

HTTPS

49ms

TLSA

55ms

SOA

0ms

MTA-STS

76ms

DNSSEC

107ms

SRV

79ms

Total

945ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-19 08:14:26	2063ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-18 07:22:00	475ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-03 13:35:58	407ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-02 18:15:14	1427ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-23 16:00:15	659ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-19 05:18:01	4822ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-17 22:14:22 shown	945ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-08 01:55:05	920ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-16 12:44:43	502ms	2 NS 2 A 0 MX	🔓 Insecure