systembook.dk DNS records

🖥️ Nameservers2 records 177ms

Nameserver	IP addresses	PTR	ASN / ISP
margo.ns.cloudflare.com	108.162.195.144 162.159.44.144 172.64.35.144 2606:4700:58::a29f:2c90 2803:f800:50::6ca2:c390 2a06:98c1:50::ac40:2390	margo.ns.cloudflare.com margo.ns.cloudflare.com margo.ns.cloudflare.com margo.ns.cloudflare.com margo.ns.cloudflare.com margo.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
melina.ns.cloudflare.com	108.162.194.184 162.159.38.184 172.64.34.184 2606:4700:50::a29f:26b8 2803:f800:50::6ca2:c2b8 2a06:98c1:50::ac40:22b8	melina.ns.cloudflare.com melina.ns.cloudflare.com melina.ns.cloudflare.com melina.ns.cloudflare.com melina.ns.cloudflare.com melina.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 202ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.4.44	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.131.166	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records

📧

No MX records found

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	104.21.4.44
🔶 Autoconfig	104.21.4.44

🔷 AAAA Records (IPv6)2 records 233ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::ac43:83a6	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:42c	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 213ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.4.44,172.67.131.166 ech=AEX+DQBBuQAgACAVz9qc58iz+1dhhN56m9SNC7t96Jlj/wAGZavvaVG5HgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::ac43:83a6,2606:4700:3037::6815:42c

📝 TXT Records1 records 536ms

TXT Record
v=spf1 -all

✉️ SPF

Policy	Record (systembook.dk)
-all (hard fail)	v=spf1 -all

📨 DMARC

Policy	Record (_dmarc.systembook.dk)
p=reject	v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; rua=mailto:d2b4b2d6aedc4b458ff74b93f5707253@dmarc-reports.cloudflare.net;

📬 MTA-STS

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records11 records 187ms

Flags	Tag	Value
0	iodef	mailto:caa-report@dinnerbooking.com
0	issue	comodoca.com
0	issue	digicert.com; cansignhttpexchanges=yes
0	issue	letsencrypt.org
0	issue	pki.goog; cansignhttpexchanges=yes
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	ssl.com

🔗 TLSA / DANE

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

🔐 DNSSEC325ms

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

🏷️ SOA0ms

Field	Value
Serial	2411671579
Primary NS (MNAME)	margo.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

177ms

A

202ms

MX

199ms

AAAA

233ms

TXT

536ms

CAA

187ms

HTTPS

213ms

TLSA

203ms

SOA

0ms

MTA-STS

238ms

DNSSEC

325ms

SRV

292ms

Total

2374ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-26 20:01:45	647ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-23 01:59:56	1421ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-11 05:21:49	2374ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-08-08 05:28:33	16816ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-07-09 11:40:14	9230ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-06-27 22:54:25	904ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-06-25 18:04:18	1045ms	2 NS 2 A 0 MX	🔒 Secure	View
2026-06-18 04:04:23	1103ms	2 NS 2 A 0 MX	🔒 Secure	View