authentication.dk DNS records

🖥️ Nameservers2 records 252ms

Nameserver	IP addresses	PTR	ASN / ISP
lina.ns.cloudflare.com	108.162.192.187 172.64.32.187 173.245.58.187 2606:4700:50::adf5:3abb 2803:f800:50::6ca2:c0bb 2a06:98c1:50::ac40:20bb	lina.ns.cloudflare.com lina.ns.cloudflare.com lina.ns.cloudflare.com lina.ns.cloudflare.com lina.ns.cloudflare.com lina.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
piotr.ns.cloudflare.com	108.162.193.222 172.64.33.222 173.245.59.222 2606:4700:58::adf5:3bde 2803:f800:50::6ca2:c1de 2a06:98c1:50::ac40:21de	piotr.ns.cloudflare.com piotr.ns.cloudflare.com piotr.ns.cloudflare.com piotr.ns.cloudflare.com piotr.ns.cloudflare.com piotr.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records2 records 267ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.40.213	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.188.98	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records1 records 222ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx.simply.com	94.231.106.20	mx.simply.com	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	172.67.188.98
🔶 Autoconfig	172.67.188.98

🔷 AAAA Records (IPv6)2 records 252ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:bc62	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:28d5	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records1 records 234ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.40.213,172.67.188.98 ech=AEX+DQBB9QAgACCYsVDLFH7wfsE46WS5IMyXviCxr3GopvAV+/LvmS9UUAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:bc62,2606:4700:3036::6815:28d5

📝 TXT Records3 records 509ms

TXT Record
google-site-verification=YhVrea0X2rKZvA-Jh90aLtkVkbNnUPVHIBiBsyeQj5k
stripe-verification=3db858e12183a3e19c9876e3a060c420c2482a59eeaa62dd4872d607b6abe23b
v=spf1 include:spf.simply.com -all

✉️ SPF

Policy	Record (authentication.dk)
-all (hard fail)	v=spf1 include:spf.simply.com -all

📨 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.authentication.dk	64Mlg8M0brsJph-O7m8zk-Xxlyu0YyYQ_Rr6BkCHLMs
TXT	_acme-challenge.authentication.dk	TY97NxEtJQIOSkZUDKDOlQvDWlVCjzbYyD1BRWGVsRw

🔗 TLSA / DANE2 records 373ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	A9D603AF4D7ED6B9246B4B68500CD6F2…
SMTP _25._tcp.mx.simply.com	DANE-EE · SPKI · SHA-256	97A3BA009F39C761BFFB6574340E8138…

🔐 DNSSEC396ms

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	2412029531
Primary NS (MNAME)	lina.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

252ms

A

267ms

MX

222ms

AAAA

252ms

TXT

509ms

CAA

239ms

HTTPS

234ms

TLSA

373ms

SOA

0ms

MTA-STS

329ms

DNSSEC

396ms

SRV

312ms

Total

2234ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-08-27 14:47:29	1537ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-14 12:42:26	1687ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-08-12 21:46:56	2234ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-07-01 20:17:52	1540ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-30 15:00:52	1424ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-29 12:41:57	705ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-26 22:23:36	856ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-25 05:54:06	940ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-24 22:16:43	856ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-20 15:54:53	948ms	2 NS 2 A 1 MX	🔓 Insecure	View
2026-06-16 13:51:36	588ms	2 NS 2 A 1 MX	🔓 Insecure	View