backswim.dk

📜 Historical scan 2026-09-03 08:47:18 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

backswim.dk is a .dk domain served by 2 nameservers (ns1.dnshotel.dk, ns2.dnshotel.dk). It was registered on 12 September 2008 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 49.12.83.125 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by backswim.dk. The zone is DNSSEC-signed and validates, 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 54ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dnshotel.dk	2a01:4f8:1c17:4999::2 88.99.120.238	ns1.dnshotel.dk ns1.dnshotel.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH
ns2.dnshotel.dk	2a01:4f8:c0c:4051::2 94.130.170.39	ns2.dnshotel.dk ns2.dnshotel.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 63ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
49.12.83.125	360s	re03.azehosting.net	AS24940	Hetzner Online GmbH	49.12.0.0/15	🇩🇪 Germany	Falkenstein

📧 MX Records#

1 records 49ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	360s	backswim.dk	2a01:4f8:2200:4382::2 49.12.83.125	re03.azehosting.net re03.azehosting.net	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🔷 AAAA Records (IPv6)#

1 records 63ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:2200:4382::2	14400s	re03.azehosting.net	AS24940	Hetzner Online GmbH	2a01:4f8:0:0:0:0:0:0/31	🇩🇪 Germany	Falkenstein

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 282ms

TXT Record
v=spf1 ip4:49.12.83.125 include:spf.azehosting.net include:spf.resellerhotel.dk +a +mx +ip4:185.221.37.134 +ip4:195.201.243.87 +ip4:94.130.52.47 +ip4:138.201.239.158 +ip4:88.99.200.26 +include:relay.mailchannels.net +include:relay.mailchannels.net ~all

✉️ SPF#

Policy	Record (backswim.dk)
~all (soft fail)	v=spf1 ip4:49.12.83.125 include:spf.azehosting.net include:spf.resellerhotel.dk +a +mx +ip4:185.221.37.134 +ip4:195.201.243.87 +ip4:94.130.52.47 +ip4:138.201.239.158 +ip4:88.99.200.26 +include:relay.mailchannels.net +include:relay.mailchannels.net ~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 2026-10-11 07:37:45

www CNAME	backswim.dk (all on backswim.dk) → 195.201.240.150 2a01:4f8:231:c7::2 (AS24940)
www vs bare domain	Same network backswim.dk: 195.201.240.150 2a01:4f8:231:c7::2 (AS24940) www.backswim.dk: 195.201.240.150 2a01:4f8:231:c7::2 (AS24940)
Wildcard	No
Denial of existence	NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	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: 8/10 · policy: ~all

warn 8 of the 10 allowed DNS lookups used: one more include can break SPF

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.backswim.dk	DNA1qXYrVxoAZiqR0HxIXOsmyXgvDswu7xi6cqW2c60

🔗 TLSA / DANE#

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

🔐 DNSSEC#

9088ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2026070701
Primary NS (MNAME)	ns1.dnshotel.dk
Responsible (RNAME)	server-admin@resellerhotel.dk
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-17 03:56:45

Field	Value
Registrar	Key-Systems GmbH
Registered	2008-09-12
Expires	2030-09-30 (1443d)

🔗 Same registrant#

8 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).

Domain	Registrar
aegirdagmar.dk	Key-Systems GmbH
akses.dk	Key-Systems GmbH
forhelvede.dk	Key-Systems GmbH
mailkontoen.dk	Key-Systems GmbH
mailmachine.dk	Key-Systems GmbH
my-sec.dk	Key-Systems GmbH
strandvaerk.dk	Key-Systems GmbH
sunesmor.dk	Key-Systems GmbH

📋 WHOIS#

⏱️ Lookup Timing#

54ms

63ms

49ms

AAAA

63ms

TXT

282ms

CAA

62ms

HTTPS

61ms

TLSA

56ms

SOA

0ms

MTA-STS

2078ms

DNSSEC

9088ms

SRV

2059ms

Total

9493ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 22:56:27	881ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-29 22:44:32	807ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-24 21:36:50	757ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-10 09:18:01	1262ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-03 08:47:18 shown	9493ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-26 15:27:43	4921ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-09 02:41:15	1791ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-26 15:08:46	1479ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-25 22:30:47	2520ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 14:00:19	760ms	2 NS 1 A 1 MX	🔒 Secure