formatmatematik.dk

📜 Historical scan 2026-06-26 04:55:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

formatmatematik.dk is a .dk domain served by 2 nameservers (cortney.ns.cloudflare.com, eric.ns.cloudflare.com). It was registered on 27 May 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.66.200 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx01.dandomain.dk. 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 38ms

Nameserver	IP addresses	PTR	ASN / ISP
cortney.ns.cloudflare.com	108.162.192.87 172.64.32.87 173.245.58.87 2606:4700:50::adf5:3a57 2803:f800:50::6ca2:c057 2a06:98c1:50::ac40:2057	cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com cortney.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
eric.ns.cloudflare.com	108.162.193.112 172.64.33.112 173.245.59.112 2606:4700:58::adf5:3b70 2803:f800:50::6ca2:c170 2a06:98c1:50::ac40:2170	eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.ns.cloudflare.com eric.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 45ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.66.200	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.207.59	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 51ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx01.dandomain.dk	212.237.249.50	mx1.dandomain.dk	AS48854 team.blue Denmark A/S

🔷 AAAA Records (IPv6)#

2 records 42ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:42c8	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::ac43:cf3b	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 46ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.66.200,172.67.207.59 ech=AEX+DQBBFgAgACDYRgZcGS0vwdTv022gHBCZoFnnpyS2lqeqYf7yRkTeaAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:42c8,2606:4700:3034::ac43:cf3b

📝 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 2026-10-11 10:53:37

www	104.21.66.200 172.67.207.59 2606:4700:3031::6815:42c8 2606:4700:3034::ac43:cf3b (AS13335) (address records, no CNAME)
www vs bare domain	Same network formatmatematik.dk: 104.21.66.200 172.67.207.59 2606:4700:3031::6815:42c8 2606:4700:3034::ac43:cf3b (AS13335) www.formatmatematik.dk: 104.21.66.200 172.67.207.59 2606:4700:3031::6815:42c8 2606:4700:3034::ac43:cf3b (AS13335)
Wildcard	No

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.formatmatematik.dk	HpbmRq8NmEVdXjcwXf930d5Q6XQV5k3Fr2Wtf0kStjQ
TXT	_acme-challenge.formatmatematik.dk	_N05l5zBCf0L_yTM4j2SaBs0tcgLPOlSoVq2XbmbHzg

🔗 TLSA / DANE#

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

🔐 DNSSEC#

105ms

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	2407782103
Primary NS (MNAME)	cortney.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-09 01:57:21

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2014-05-27
Expires	2027-05-31 (225d)

📋 WHOIS#

⏱️ Lookup Timing#

38ms

45ms

51ms

AAAA

42ms

TXT

144ms

CAA

26ms

HTTPS

46ms

TLSA

59ms

SOA

0ms

MTA-STS

61ms

DNSSEC

105ms

SRV

61ms

Total

685ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 04:30:59	558ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-28 09:01:51	697ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-25 08:29:00	744ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-17 20:02:20	1017ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-10 18:07:10	1922ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-10 18:03:09	985ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-23 10:44:23	1164ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-06 03:57:11	1884ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-01 07:50:23	627ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-26 04:55:49 shown	685ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-23 20:31:50	826ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-23 03:16:49	3836ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-22 21:59:15	967ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-22 17:47:42	845ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-21 21:34:19	1583ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 12:19:41	674ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 10:09:32	2029ms	2 NS 2 A 1 MX	🔓 Insecure