t21.dk

📜 Historical scan 2026-06-30 06:12:45 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

t21.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, dan.ns.cloudflare.com). It was registered on 9 February 2007 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.45.32 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 39ms

Nameserver	IP addresses	PTR	ASN / ISP
barbara.ns.cloudflare.com	108.162.192.248 172.64.32.248 173.245.58.248 2606:4700:50::adf5:3af8 2803:f800:50::6ca2:c0f8 2a06:98c1:50::ac40:20f8	barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
dan.ns.cloudflare.com	108.162.193.108 172.64.33.108 173.245.59.108 2606:4700:58::adf5:3b6c 2803:f800:50::6ca2:c16c 2a06:98c1:50::ac40:216c	dan.ns.cloudflare.com dan.ns.cloudflare.com dan.ns.cloudflare.com dan.ns.cloudflare.com dan.ns.cloudflare.com dan.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 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.45.32	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.208.90	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 33ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::ac43:d05a	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::6815:2d20	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 34ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.45.32,172.67.208.90 ech=AEX+DQBBUQAgACAgvpA9jtAmAp0qHihscSSN8GZk44bsTnw2cYliSkAZGAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:d05a,2606:4700:3035::6815:2d20

📝 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 2026-10-13 05:17:36

www	104.21.45.32 172.67.208.90 2606:4700:3034::ac43:d05a 2606:4700:3035::6815:2d20 (AS13335) (address records, no CNAME)
www vs bare domain	Same network t21.dk: 104.21.45.32 172.67.208.90 2606:4700:3034::ac43:d05a 2606:4700:3035::6815:2d20 (AS13335) www.t21.dk: 104.21.45.32 172.67.208.90 2606:4700:3034::ac43:d05a 2606:4700:3035::6815:2d20 (AS13335)
Wildcard	No

🔗 TLSA / DANE#

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

🔐 DNSSEC#

78ms

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

🏷️ SOA#

30ms

Field	Value
Serial	2406059779
Primary NS (MNAME)	barbara.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-04 20:09:31

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2007-02-09
Expires	2027-07-31 (285d)

📋 WHOIS#

⏱️ Lookup Timing#

39ms

36ms

58ms

AAAA

33ms

TXT

181ms

CAA

32ms

HTTPS

34ms

TLSA

56ms

SOA

30ms

MTA-STS

44ms

DNSSEC

78ms

SRV

48ms

Total

798ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-13 05:17:36	430ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-05 19:40:44	525ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-04 19:36:14	415ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-30 19:20:40	552ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-25 13:18:01	9397ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-05 11:16:38	497ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-31 20:37:52	618ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-28 05:11:07	813ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-09 14:17:47	941ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-01 02:42:26	963ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-03 10:56:50	855ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-01 04:19:21	730ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-30 06:12:45 shown	798ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-21 02:33:20	545ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-18 05:00:36	954ms	2 NS 2 A 0 MX	🔓 Insecure