rsf1935.dk

📜 Historical scan 2026-09-12 20:04:06 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

rsf1935.dk is a .dk domain served by 2 nameservers (dns-e.duelhost.dk, dns-f.duelhost.dk). It was registered on 8 April 2016 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 198.202.211.1 is hosted by Cloudflare London, LLC (AS209242) in United States. Mail is handled by mail.rsf1935.dk. The zone is not DNSSEC-signed, publishes a DMARC policy and has no IPv6 address. 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 49ms

Nameserver	IP addresses	PTR	ASN / ISP
dns-e.duelhost.dk	49.12.84.170	cde4.duelhost.dk	AS24940 Hetzner Online GmbH
dns-f.duelhost.dk	195.201.247.57	dns-f.duelhost.dk	AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 74ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
198.202.211.1	300s	—	AS209242	Cloudflare London, LLC	198.202.211.0/24	🇺🇸 United States	—

📧 MX Records#

1 records 74ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mail.rsf1935.dk	49.12.84.170	cde4.duelhost.dk	AS24940 Hetzner Online GmbH

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 466ms

TXT Record
v=spf1 a mx include:relay.mailchannels.net -all

✉️ SPF#

Policy	Record (rsf1935.dk)
-all (hard fail)	v=spf1 a mx include:relay.mailchannels.net -all

📨 DMARC#

Policy	Record (_dmarc.rsf1935.dk)
p=none (monitor only)	v=DMARC1; p=none; sp=none

📬 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 2026-10-09 21:44:34

www CNAME	cdn.webflow.com (all on webflow.com) → 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242)
www vs bare domain	Different networks rsf1935.dk: 193.200.90.182 (AS62121) www.rsf1935.dk: 198.202.211.1 2620:cb:2000::1 (AS13335 AS209242) (all like this)
Wildcard	No

✍️ 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: 3/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

325ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026091100
Primary NS (MNAME)	dns-e.duelhost.dk
Responsible (RNAME)	hostmaster@rsf1935.dk
Refresh	3600s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-10 18:01:06

Field	Value
Registrar	dns.services ApS
Registered	2016-04-08
Expires	2028-04-30 (550d)

📋 WHOIS#

⏱️ Lookup Timing#

49ms

74ms

AAAA

117ms

TXT

466ms

CAA

205ms

HTTPS

253ms

TLSA

1798ms

SOA

0ms

MTA-STS

308ms

DNSSEC

325ms

SRV

251ms

Total

2793ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 16:50:33	2370ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-27 15:37:57	566ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-22 21:51:20	969ms	5 NS 1 A 1 MX	🔓 Insecure
2026-09-12 20:04:06 shown	2793ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-17 13:16:56	1664ms	2 NS 1 A 1 MX	🔓 Insecure