sejling.dk

📜 Historical scan 2026-08-15 09:13:13  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

sejling.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, justin.ns.cloudflare.com). It was registered on 24 March 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.90.103 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. 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   261ms
NameserverIP addressesPTRASN / ISP
barbara.ns.cloudflare.com 108.162.192.248
172.64.32.248
173.245.58.248
2606:4700:50::adf5:3af8
2803:f800:50::6ca2:c0f8
2a06:98c1:50::ac40:20f8		 barbara.ns.cloudflare.com
barbara.ns.cloudflare.com
barbara.ns.cloudflare.com
barbara.ns.cloudflare.com
barbara.ns.cloudflare.com
barbara.ns.cloudflare.com		 AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
AS13335 Cloudflare, Inc.
justin.ns.cloudflare.com 108.162.193.187
172.64.33.187
173.245.59.187
2606:4700:58::adf5:3bbb
2803:f800:50::6ca2:c1bb
2a06:98c1:50::ac40:21bb		 justin.ns.cloudflare.com
justin.ns.cloudflare.com
justin.ns.cloudflare.com
justin.ns.cloudflare.com
justin.ns.cloudflare.com
justin.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   236ms
IPTTLPTRASNISP / OrgCIDRCountryCity
104.21.90.103 300s — AS13335 Cloudflare, Inc. 104.21.0.0/17 — —
172.67.199.217 300s — AS13335 Cloudflare, Inc. 172.67.128.0/17 — —

📧 MX Records#

2 records   245ms
PriorityTTLMail ServerIP addressesPTRASN
10 3600s mx1.onlinemail.io 185.21.42.12 mx1.onlinemail.io AS48854 team.blue Denmark A/S
20 3600s mx2.onlinemail.io 46.36.208.16 mx2.onlinemail.io AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscoverautodiscover-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

2 records   216ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2606:4700:3036::6815:5a67 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —
2606:4700:3037::ac43:c7d9 300s — AS13335 Cloudflare, Inc. 2606:4700:3000:0:0:0:0:0/42 — —

🔐 HTTPS Records#

1 records   241ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.90.103,172.67.199.217 ech=AEX+DQBBDAAgACDJ97/zr6EzxmF4bB5xQKnHIDzdZoXnTmhe8btt+I57LgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:5a67,2606:4700:3037::ac43:c7d9

📝 TXT Records#

1 records   519ms
TXT Record
v=spf1 a include:spf.curanet.dk ~all

✉️ SPF#

PolicyRecord (sejling.dk)
~all (soft fail) v=spf1 a include:spf.curanet.dk ~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 2026-10-19 16:39:12
www104.21.90.103 172.67.199.217 2606:4700:3036::6815:5a67 2606:4700:3037::ac43:c7d9 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardNo

✍️ DKIM keys#

2 found
SelectorCNAMEKey
selector1 selector1-sejling-dk._domainkey.sejling.a-v1.dkim.mail.microsoft RSA · ~2048 bit
selector2 selector2-sejling-dk._domainkey.sejling.a-v1.dkim.mail.microsoft 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: 4/10 · policy: ~all

No problems found

🔏 ACME Challenge#

TypeNameValue
TXT _acme-challenge.sejling.dk J8-1I50ZLpDQTvztL6pxtSjEMo07Sd35S8LeiCA42Kw
TXT _acme-challenge.sejling.dk xfLUHjc0X9efMaE-3N7lqIck79iK_lC6Jf2sqm7-D7c

🔗 TLSA / DANE#

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

🔐 DNSSEC#

397ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

0ms
FieldValue
Serial2412232120
Primary NS (MNAME)barbara.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-17 12:47:09
FieldValue
RegistrarPunktum dk A/S (direct)
Registered1998-03-24
Expires2027-03-31 (159d)

🔗 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
261ms
A
236ms
MX
245ms
AAAA
216ms
TXT
519ms
CAA
247ms
HTTPS
241ms
TLSA
309ms
SOA
0ms
MTA-STS
303ms
DNSSEC
397ms
SRV
281ms
Total
5512ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-19 16:39:12 1708ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-18 14:52:00 1485ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-17 12:27:05 1690ms 2 NS 2 A 1 MX 🔓 Insecure
2026-10-14 08:14:19 1161ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-27 17:27:12 1447ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-24 16:35:32 1024ms 2 NS 2 A 1 MX 🔓 Insecure
2026-09-23 15:34:19 676ms 2 NS 2 A 2 MX 🔓 Insecure
2026-08-16 09:58:39 17012ms 2 NS 2 A 2 MX 🔓 Insecure
2026-08-15 09:13:13 shown 5512ms 2 NS 2 A 2 MX 🔓 Insecure
2026-08-03 10:02:51 1073ms 2 NS 2 A 2 MX 🔓 Insecure
2026-06-20 16:16:18 982ms 2 NS 2 A 2 MX 🔓 Insecure
2026-06-17 12:57:46 2865ms 2 NS 2 A 2 MX 🔓 Insecure
dhd.dk [/] search Domains, Hosts & DNS — .dk zone