authentication.dk

Records from scan: 2026-10-17 16:33:06  ·  486ms total
⬇ 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 our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records   33ms
NameserverIP addressesPTRASN / 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 Records#

2 records   38ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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 Records#

1 records   31ms
PriorityTTLMail ServerIP addressesPTRASN
10 300s mx.simply.com 94.231.103.108
94.231.106.20		 mx.simply.com
mx.simply.com		 AS48854 team.blue Denmark A/S
AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover104.21.40.213
🔶 Autoconfig104.21.40.213

🔷 AAAA Records (IPv6)#

2 records   39ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
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 Records#

1 records   63ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.40.213,172.67.188.98 ech=AEX+DQBB8AAgACBPnx/16XflsNmOI6JjF7FUwQDCdR8pGc7GdGe7D042YwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:bc62,2606:4700:3036::6815:28d5

📝 TXT Records#

3 records   168ms
TXT Record
google-site-verification=YhVrea0X2rKZvA-Jh90aLtkVkbNnUPVHIBiBsyeQj5k
stripe-verification=3db858e12183a3e19c9876e3a060c420c2482a59eeaa62dd4872d607b6abe23b
v=spf1 include:spf.simply.com -all

✉️ SPF#

PolicyRecord (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#

checked 2026-10-17 16:33:06
www104.21.40.213 172.67.188.98 2606:4700:3030::ac43:bc62 2606:4700:3036::6815:28d5 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.authentication.dk kFvOvizp2vOQDnvhTXJRDdurmiSpfxax6GraiFI2U7k
TXT _acme-challenge.authentication.dk l611UTadVBBwGv5vqxqULJDPDHQZ6Uc6WKzRGggZ3hY

🔗 TLSA / DANE#

1 records   62ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.simply.com DANE-EE · SPKI · SHA-256 4B949F05A63FED95FC94B3A83DD70167…

🔐 DNSSEC#

64ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

47ms
FieldValue
Serial2417654008
Primary NS (MNAME)lina.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-11 09:47:33
FieldValue
RegistrarSimply.com A/S
Registered2019-11-04
Expires2026-11-30 (43d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
33ms
A
38ms
MX
31ms
AAAA
39ms
TXT
168ms
CAA
31ms
HTTPS
63ms
TLSA
62ms
SOA
47ms
MTA-STS
68ms
DNSSEC
64ms
SRV
74ms
Total
486ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-17 16:33:06 shown 486ms 2 NS 2 A 1 MX 🔓 Insecure
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 588ms 2 NS 2 A 1 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone