authentication.dk

📜 Historical scan 2026-06-16 13:51:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

authentication.dk is a .dk domain served by 2 nameservers (lina.ns.cloudflare.com, piotr.ns.cloudflare.com). It was registered on 4 November 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.40.213 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.simply.com. 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
lina.ns.cloudflare.com	—	—	—
piotr.ns.cloudflare.com	—	—	—

🌍 A Records#

2 records 42ms

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

📧 MX Records#

1 records 33ms

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

🔷 AAAA Records (IPv6)#

2 records 45ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3031::6815:28d5	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:bc62	—	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 33ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=188.114.96.1,188.114.97.1 ech=AEX+DQBBlwAgACA41AMgc1sbai2CoOVhilCbC1JktSaHjQMIOv4l671bLwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2a06:98c1:3120::1,2a06:98c1:3121::1

📝 TXT Records#

3 records 136ms

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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-16 16:22:45

www	104.21.40.213 172.67.188.98 2606:4700:3030::ac43:bc62 2606:4700:3036::6815:28d5 (AS13335) (address records, no CNAME)
www vs bare domain	Same network authentication.dk: 104.21.40.213 172.67.188.98 2606:4700:3030::ac43:bc62 2606:4700:3036::6815:28d5 (AS13335) www.authentication.dk: 104.21.40.213 172.67.188.98 2606:4700:3030::ac43:bc62 2606:4700:3036::6815:28d5 (AS13335)
Wildcard	Yes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

2 records 63ms

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…

🔐 DNSSEC#

126ms

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

🏷️ SOA#

43ms

Field	Value
Serial	2404027693
Primary NS (MNAME)	lina.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-11 09:47:33

Field	Value
Registrar	Simply.com A/S
Registered	2019-11-04
Expires	2026-11-30 (43d)

📋 WHOIS#

⏱️ Lookup Timing#

33ms

42ms

33ms

AAAA

45ms

TXT

136ms

CAA

44ms

HTTPS

33ms

TLSA

63ms

SOA

43ms

MTA-STS

59ms

DNSSEC

126ms

SRV

0ms

Total

588ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-16 16:22:45	483ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-15 15:49:20	2504ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-13 11:34:39	403ms	2 NS 2 A 1 MX	🔓 Insecure
2026-10-11 09:15:23	2350ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-27 14:47:29	1537ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-14 12:42:26	1687ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-12 21:46:56	2234ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-01 20:17:52	1540ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-30 15:00:52	1424ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-29 12:41:57	705ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-26 22:23:36	856ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-25 05:54:06	940ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-24 22:16:43	856ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-20 15:54:53	948ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-16 13:51:36 shown	588ms	2 NS 2 A 1 MX	🔓 Insecure