zfu.dk

📜 Historical scan 2026-07-17 10:59:53 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

zfu.dk is a .dk domain served by 3 nameservers (ns1.dns.services, ns2.dns.services, ns3.dns.services). It was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mail.zfu.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#

3 records 78ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.dns.services	195.242.131.6 2001:67c:564:ffff::11	ns1.dns.services ns1.dns.services	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.dns.services	2a00:1b18:2:3:3::2 62.69.152.37	ns2.dns.services ns2.dns.services	AS47527 DLX A/S AS47527 DLX A/S
ns3.dns.services	185.55.197.53	ns3.dns.services	AS60153 Inpadi ApS

🌍 A Records#

🌍

No A records found

📧 MX Records#

1 records 76ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.zfu.dk	5.186.52.29	5.186.52.29.static.fibianet.dk	AS44869 FIBIA P/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	mail.zfu.dk → 5.186.52.29
🔶 Autoconfig	mail.zfu.dk → 5.186.52.29

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 301ms

TXT Record
v=spf1 mx a -all

✉️ SPF#

Policy	Record (zfu.dk)
-all (hard fail)	v=spf1 mx a -all

📨 DMARC#

Policy	Record (_dmarc.zfu.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:mailauth-reports@zfu.dk

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

1 records 85ms

Flags	Tag	Value
128	issue	letsencrypt.org;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/2360511167

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-09 16:41:49

www	NXDOMAIN
www vs bare domain	Neither resolves zfu.dk: no address www.zfu.dk: no address
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
dkim	—	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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

205ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

71ms

Field	Value
Serial	2026041711
Primary NS (MNAME)	ns1.dns.services
Responsible (RNAME)	post@dns.services
Refresh	10800s
Retry	3600s
Expire	1814400s
Minimum (neg-cache TTL)	7200s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

78ms

87ms

76ms

AAAA

83ms

TXT

301ms

CAA

85ms

HTTPS

77ms

TLSA

83ms

SOA

71ms

MTA-STS

89ms

DNSSEC

205ms

SRV

186ms

Total

16789ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-13 16:20:00	434ms	3 NS 0 A 1 MX	🔓 Insecure
2026-09-04 10:32:52	9513ms	3 NS 0 A 1 MX	🔓 Insecure
2026-08-04 09:08:15	2614ms	3 NS 0 A 1 MX	🔓 Insecure
2026-07-17 10:59:53 shown	16789ms	3 NS 0 A 1 MX	🔓 Insecure
2026-06-17 12:01:13	1074ms	3 NS 0 A 1 MX	🔓 Insecure