schack.dk DNS records

🖥️ Nameservers2 records 33ms

Nameserver	IP addresses	PTR	ASN / ISP
serena.ns.cloudflare.com	108.162.192.220 172.64.32.220 173.245.58.220 2606:4700:50::adf5:3adc 2803:f800:50::6ca2:c0dc 2a06:98c1:50::ac40:20dc	serena.ns.cloudflare.com serena.ns.cloudflare.com serena.ns.cloudflare.com serena.ns.cloudflare.com serena.ns.cloudflare.com serena.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
tom.ns.cloudflare.com	108.162.193.147 172.64.33.147 173.245.59.147 2606:4700:58::adf5:3b93 2803:f800:50::6ca2:c193 2a06:98c1:50::ac40:2193	tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com tom.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 30ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.29.137	—	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.149.57	—	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records4 records 46ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx1.smtp.goog	2001:4860:4802:32::97 216.239.32.151	— —	AS15169 Google LLC AS15169 Google LLC
20	—	mx2.smtp.goog	2001:4860:4802:34::97 216.239.34.151	— —	AS15169 Google LLC AS15169 Google LLC
30	—	mx3.smtp.goog	2001:4860:4802:36::97 216.239.36.151	— —	AS15169 Google LLC AS15169 Google LLC
40	—	mx4.smtp.goog	2001:4860:4802:38::97 216.239.38.151	— —	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)2 records 46ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:9539	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:1d89	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 48ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.29.137,172.67.149.57 ech=AEX+DQBB5wAgACAfhnj2QjvcLesWssUrB3a5fnOhseRkvqgkI6RuTYeBJAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:9539,2606:4700:3034::6815:1d89

📝 TXT Records3 records 140ms

TXT Record
mistral-domain-verification=fae9e90ae3703920e9421e8d2d9eaaf4d5a9b795
openai-domain-verification=dv-9gxiYiBXT7nBwtW2TCZ6XPkQ
v=spf1 include:_spf.google.com ~all

✉️ SPF

Policy	Record (schack.dk)
~all (soft fail)	v=spf1 include:_spf.google.com ~all

📨 DMARC

Policy	Record (_dmarc.schack.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:bb6ab26b32e34559840e217383020d64@dmarc-reports.cloudflare.net,mailto:sh0izc5x@ag.dmarcian.com,mailto:watchdog3@watchdog.kevlarr.io,mailto:31080488@in.mailhardener.com;

📬 MTA-STS121ms

Check	Result
Status	🔒 Enforce
TXT record (_mta-sts)	✓ Found
HTTPS policy	✓ Valid
Mode	enforce
Policy ID	2025090301
max_age	172800s
Policy MX	MX1.SMTP.GOOG, MX2.SMTP.GOOG, MX3.SMTP.GOOG, MX4.SMTP.GOOG

📈 TLSRPT

Status	Report address (rua)
✓ Enabled	mailto:tlsrpt@apxhe1k9.uriports.com

📜 CAA Records13 records 50ms

Flags	Tag	Value
0	iodef	mailto:henrik@schack.dk
0	issue	comodoca.com
0	issue	digicert.com; cansignhttpexchanges=yes
0	issue	letsencrypt.org
0	issue	pki.goog; cansignhttpexchanges=yes
0	issue	sectigo.com
0	issue	ssl.com
0	issuewild	comodoca.com
0	issuewild	digicert.com; cansignhttpexchanges=yes
0	issuewild	letsencrypt.org
0	issuewild	pki.goog; cansignhttpexchanges=yes
0	issuewild	sectigo.com
0	issuewild	ssl.com

🔗 TLSA / DANE

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

🔐 DNSSEC58ms

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

🏷️ SOA59ms

Field	Value
Serial	2407091514
Primary NS (MNAME)	serena.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

33ms

A

30ms

MX

46ms

AAAA

46ms

TXT

140ms

CAA

50ms

HTTPS

48ms

TLSA

77ms

SOA

59ms

MTA-STS

121ms

DNSSEC

58ms

SRV

0ms

Total

1071ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-31 22:51:22	3508ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-27 19:50:15	881ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-21 22:48:01	2203ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-20 22:41:06	15013ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-19 22:10:09	13035ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-07 16:03:40	1907ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-08-01 21:47:27	1505ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-07-20 11:48:22	17827ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-07-18 20:32:45	1827ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-07-12 14:26:52	1811ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-07-08 14:09:33	10221ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-07-06 23:07:40	18544ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-30 10:12:56	2432ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-26 05:23:43	1467ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-24 02:42:52	1596ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-23 20:40:37	904ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-22 02:03:00	739ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-21 05:03:08	3639ms	2 NS 2 A 4 MX	🔒 Secure	View
2026-06-17 15:06:29	1071ms	2 NS 2 A 4 MX	🔒 Secure	View