sejling.dk

📜 Historical scan 2026-10-18 14:52:00 · ← 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 sejling-dk.mail.protection.outlook.com. The zone is not DNSSEC-signed, 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 95ms

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 111ms

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#

1 records 128ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	sejling-dk.mail.protection.outlook.com	2a01:111:f403:c967:: 2a01:111:f403:c967::2 2a01:111:f403:c967::4 2a01:111:f403:c967::6 52.101.209.2 52.101.209.4 52.101.209.6 52.101.209.74	mail-cpcp307cu00400.inbound.protection.outlook.com mail-cpap307cu00402.inbound.protection.outlook.com mail-cpap307cu00204.inbound.protection.outlook.com mail-cpcp307cu00206.inbound.protection.outlook.com mail-cpap307cu00402.inbound.protection.outlook.com mail-cpap307cu00204.inbound.protection.outlook.com mail-cpcp307cu00206.inbound.protection.outlook.com mail-cpcp307cu00402.inbound.protection.outlook.com	AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation AS8075 Microsoft Corporation

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover.outlook.com → 52.98.149.152

🔷 AAAA Records (IPv6)#

2 records 138ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
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 140ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.90.103,172.67.199.217 ech=AEX+DQBBvAAgACBna+jyTvlpYDGQRQiZZDdqjboRr6Bm4yRSsQU9L3txBgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3036::6815:5a67,2606:4700:3037::ac43:c7d9

📝 TXT Records#

2 records 266ms

TXT Record
MS=ms96110189
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (sejling.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

Policy	Record (_dmarc.sejling.dk)
p=none (monitor only)	v=DMARC1; p=none; pct=100

📬 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: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.sejling.dk	AVZbd01JHxkwEFL5tJuPptSq8ZoPRIsgccrAGgJrtPg
TXT	_acme-challenge.sejling.dk	Qf2kR2K1U01uJW70dzqWH9Jhq8wxv35Gc_AOYkZ93qs

🔗 TLSA / DANE#

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

🔐 DNSSEC#

203ms

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

🏷️ SOA#

15ms

Field	Value
Serial	2417391096
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#

95ms

111ms

128ms

AAAA

138ms

TXT

266ms

CAA

127ms

HTTPS

140ms

TLSA

242ms

SOA

15ms

MTA-STS

135ms

DNSSEC

203ms

SRV

409ms

Total

1485ms

🕐 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 shown	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	982ms	2 NS 2 A 2 MX	🔓 Insecure
2026-06-17 12:57:46	2865ms	2 NS 2 A 2 MX	🔓 Insecure