formatmatematik.dk DNS records

🖥️ Nameservers2 records 49ms

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 Records2 records 34ms

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 Records1 records 50ms

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 49ms

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 Records1 records 53ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.66.200,172.67.207.59 ech=AEX+DQBBIAAgACAMeEO3Yz4a72LLARptZhZ1bOQXgXiaVjsr69qn2oajcAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= 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

🔏 ACME Challenge

Type	Name	Value
TXT	_acme-challenge.formatmatematik.dk	SJVSz0gheoPmRa3SCtE8sjJYehrJTPVWte6h-pYXW3I
TXT	_acme-challenge.formatmatematik.dk	VwDYhkSeuuw6Cxb6OCnuY3EeGyeKcniJpAij4_zYzZE

🔗 TLSA / DANE

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

🔐 DNSSEC76ms

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

🏷️ SOA0ms

Field	Value
Serial	2412887925
Primary NS (MNAME)	cortney.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

49ms

A

34ms

MX

50ms

AAAA

49ms

TXT

212ms

CAA

47ms

HTTPS

53ms

TLSA

76ms

SOA

0ms

MTA-STS

68ms

DNSSEC

76ms

SRV

63ms

Total

1164ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-23 10:44:23	1164ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-06 03:57:11	1884ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-01 07:50:23	627ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-26 04:55:49	685ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-23 20:31:50	826ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-23 03:16:49	3836ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-22 21:59:15	967ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-22 17:47:42	845ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-21 21:34:19	1583ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-20 12:19:41	674ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-17 10:09:32	2029ms	2 NS 2 A 1 MX	🔓 Insecure	View