sejling.dk

📜 Historical scan 2026-06-20 16:16:18 · ← 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 72ms

Nameserver	IP addresses	PTR	ASN / 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 56ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
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 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
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#

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

2 records 56ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::ac43:c7d9	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::6815:5a67	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 69ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.90.103,172.67.199.217 ech=AEX+DQBBswAgACCtzfl+JLJmLUjZC1ZCnYHzuwbLlQguO5mcGuxGsJs9PwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::ac43:c7d9,2606:4700:3036::6815:5a67

📝 TXT Records#

1 records 300ms

TXT Record
v=spf1 a include:spf.curanet.dk ~all

✉️ SPF#

Policy	Record (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

www	104.21.90.103 172.67.199.217 2606:4700:3036::6815:5a67 2606:4700:3037::ac43:c7d9 (AS13335) (address records, no CNAME)
www vs bare domain	Same network sejling.dk: 104.21.90.103 172.67.199.217 2606:4700:3036::6815:5a67 2606:4700:3037::ac43:c7d9 (AS13335) www.sejling.dk: 104.21.90.103 172.67.199.217 2606:4700:3036::6815:5a67 2606:4700:3037::ac43:c7d9 (AS13335)
Wildcard	No

✍️ DKIM keys#

2 found

Selector	CNAME	Key
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

🔗 TLSA / DANE#

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

🔐 DNSSEC#

235ms

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

🏷️ SOA#

61ms

Field	Value
Serial	2405918167
Primary NS (MNAME)	barbara.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-17 12:47:09

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	1998-03-24
Expires	2027-03-31 (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#

72ms

56ms

57ms

AAAA

56ms

TXT

300ms

CAA

67ms

HTTPS

69ms

TLSA

191ms

SOA

61ms

MTA-STS

77ms

DNSSEC

235ms

SRV

158ms

Total

982ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
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	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 shown	982ms	2 NS 2 A 2 MX	🔓 Insecure
2026-06-17 12:57:46	2865ms	2 NS 2 A 2 MX	🔓 Insecure