dfbu.dk

📜 Historical scan 2026-10-01 01:16:31 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dfbu.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 176.20.24.237 is hosted by TDC Holding A/S (AS3292) in Denmark. Mail is handled by eu1-smtp-mx1.titanhq.com, eu1-smtp-mx2.titanhq.com. The zone is DNSSEC-signed and validates, has no 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
176.20.24.237	3600s	—	AS3292	TDC Holding A/S	176.20.0.0/17	🇩🇰 Denmark	Brøndby

📧 MX Records#

2 records 37ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	eu1-smtp-mx1.titanhq.com	3.125.67.59 3.70.162.203 35.158.11.197 35.158.242.254	eu1-smtp1.titanhq.com eu1-smtp1.titanhq.com eu1-smtp2.titanhq.com eu1-smtp2.titanhq.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.
20	3600s	eu1-smtp-mx2.titanhq.com	3.125.67.59 3.70.162.203 35.158.11.197 35.158.242.254	eu1-smtp1.titanhq.com eu1-smtp1.titanhq.com eu1-smtp2.titanhq.com eu1-smtp2.titanhq.com	AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc. AS16509 Amazon.com, Inc.

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 132ms

TXT Record
v=spf1 include:spf.onkta.dk include:_spf.mailersend.net ~all

✉️ SPF#

Policy	Record (dfbu.dk)
~all (soft fail)	v=spf1 include:spf.onkta.dk include:_spf.mailersend.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 2026-10-09 06:11:04

www CNAME	dfbu.dk (all on dfbu.dk) → 176.20.24.237 (AS3292)
www vs bare domain	Same network dfbu.dk: 176.20.24.237 (AS3292) www.dfbu.dk: 176.20.24.237 (AS3292)
Wildcard	No
Denial of existence	NSEC3 · 0 iterations · no salt RFC 9276 ✓
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

55ms

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

🏷️ SOA#

27ms

Field	Value
Serial	2026093001
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

33ms

34ms

37ms

AAAA

36ms

TXT

132ms

CAA

36ms

HTTPS

39ms

TLSA

111ms

SOA

27ms

MTA-STS

64ms

DNSSEC

55ms

SRV

70ms

Total

1188ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-06 01:35:06	679ms	2 NS 1 A 2 MX	🔒 Secure
2026-10-01 01:16:31 shown	1188ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-30 13:57:33	817ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-26 13:25:12	4612ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-24 06:05:55	1788ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-31 18:29:24	583ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-28 02:35:36	1999ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-26 15:34:54	1175ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-18 23:33:19	1060ms	2 NS 1 A 2 MX	🔒 Secure
2026-07-03 01:01:14	843ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-27 09:46:17	593ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 02:35:58	466ms	2 NS 1 A 1 MX	🔒 Secure