s3n.dk

📜 Historical scan 2026-06-18 07:52:26  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

s3n.dk is a .dk domain served by 2 nameservers (marty.ns.cloudflare.com, vera.ns.cloudflare.com). It was registered on 17 May 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.tutanota.de. The zone is DNSSEC-signed and validates, publishes a 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   169ms
NameserverIP addressesPTRASN / ISP
marty.ns.cloudflare.com 108.162.193.204
172.64.33.204
173.245.59.204
2606:4700:58::adf5:3bcc
2803:f800:50::6ca2:c1cc
2a06:98c1:50::ac40:21cc		 marty.ns.cloudflare.com
marty.ns.cloudflare.com
marty.ns.cloudflare.com
marty.ns.cloudflare.com
marty.ns.cloudflare.com
marty.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
vera.ns.cloudflare.com 108.162.192.147
172.64.32.147
173.245.58.147
2606:4700:50::adf5:3a93
2803:f800:50::6ca2:c093
2a06:98c1:50::ac40:2093		 vera.ns.cloudflare.com
vera.ns.cloudflare.com
vera.ns.cloudflare.com
vera.ns.cloudflare.com
vera.ns.cloudflare.com
vera.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   171ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.71.193 — — AS13335 — — — —
172.67.148.40 — — AS13335 — — — —

📧 MX Records#

1 records   178ms
PriorityTTLMail ServerIP addressesPTRASN
65535 — mail.tutanota.de 185.205.69.211
185.205.69.213
185.205.69.214		 mail.w11.tutanota.de
mail.w13.tutanota.de
mail.w14.tutanota.de		 AS210909 Tutao GmbH
AS210909 Tutao GmbH
AS210909 Tutao GmbH

🔷 AAAA Records (IPv6)#

2 records   204ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3031::6815:47c1 — — AS13335 — — — —
2606:4700:3034::ac43:9428 — — AS13335 — — — —

🔐 HTTPS Records#

1 records   196ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.71.193,172.67.148.40 ech=AEX+DQBBXgAgACBYdqEg9t+ceUEOewqh+wmq9pQHyffrmdwg5FCZq2THbwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3031::6815:47c1,2606:4700:3034::ac43:9428

📝 TXT Records#

4 records   356ms
TXT Record
google-site-verification=3Iv_E7ttWj4v-y-fJ9pzWRRSKmNqxS53m4rwSdyrByQ
keybase-site-verification=78uuufcmS9Lnfm0-0zUXXldSrvmKFGNHVF5WGFOhRis
t-verify=9d632af90651f576a19bcf834a94f977
v=spf1 include:spf.tutanota.de -all

✉️ SPF#

PolicyRecord (s3n.dk)
-all (hard fail) v=spf1 include:spf.tutanota.de -all

📨 DMARC#

PolicyRecord (_dmarc.s3n.dk)
p=quarantine v=DMARC1; p=quarantine; adkim=s; rua=mailto:0d9d2892e57c41d69b10c87090246dba@dmarc-reports.cloudflare.net;

📬 MTA-STS#

393ms
CheckResult
Status⚠️ Invalid
TXT record (_mta-sts)✓ Found
HTTPS policy✗ Missing / invalid
Policy ID20190723
Policy MX—

📈 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 2026-10-14 20:17:05
www104.21.71.193 172.67.148.40 2606:4700:3033::6815:47c1 2606:4700:3035::ac43:9428 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo
Denial of existenceCompact NSEC (RFC 9824, "black lies") not walkable
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

2 found
SelectorCNAMEKey
s1 s1.domainkey.tutanota.de RSA · ~2048 bit
s2 s2.domainkey.tutanota.de RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

1 records   554ms
Service / OwnerTypeCert association
SMTP _25._tcp.mail.tutanota.de DANE-EE · Full cert · SHA-256 D141F8F3A4AAC2E4D2677AAFCC723D8E…

🔐 DNSSEC#

270ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsfully validated

🏷️ SOA#

175ms
FieldValue
Serial2407089859
Primary NS (MNAME)marty.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-14 20:47:45
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2018-05-17
Expires2028-05-31 (586d)

🔗 Same registrant#

0 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

No other domain with this registrant in our WHOIS data yet
📋 WHOIS#

⏱️ Lookup Timing#

NS
169ms
A
171ms
MX
178ms
AAAA
204ms
TXT
356ms
CAA
170ms
HTTPS
196ms
TLSA
554ms
SOA
175ms
MTA-STS
393ms
DNSSEC
270ms
SRV
183ms
Total
1801ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-14 20:17:05 2288ms 2 NS 2 A 1 MX 🔒 Secure
2026-09-29 21:30:24 1256ms 2 NS 2 A 1 MX 🔒 Secure
2026-09-26 21:04:06 2539ms 2 NS 2 A 1 MX 🔒 Secure
2026-09-24 20:26:33 1008ms 2 NS 2 A 1 MX 🔒 Secure
2026-09-21 07:59:41 776ms 2 NS 2 A 1 MX 🔒 Secure
2026-09-16 19:39:01 2012ms 2 NS 2 A 1 MX 🔒 Secure
2026-08-28 00:10:40 870ms 2 NS 2 A 1 MX 🔒 Secure
2026-08-07 20:11:43 2067ms 2 NS 2 A 1 MX 🔒 Secure
2026-08-02 16:44:47 1370ms 2 NS 2 A 1 MX 🔒 Secure
2026-07-20 10:01:10 1841ms 2 NS 2 A 1 MX 🔒 Secure
2026-07-11 13:57:12 1069ms 2 NS 2 A 1 MX 🔒 Secure
2026-06-27 08:27:53 1066ms 2 NS 2 A 1 MX 🔒 Secure
2026-06-27 00:42:17 2084ms 2 NS 2 A 1 MX 🔒 Secure
2026-06-19 22:51:20 11615ms 2 NS 2 A 1 MX 🔒 Secure
2026-06-18 07:52:53 1766ms 2 NS 2 A 1 MX 🔒 Secure
2026-06-18 07:52:26 shown 1801ms 2 NS 2 A 1 MX 🔒 Secure
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