yfu.dk

📜 Historical scan 2026-10-09 10:17:13 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

yfu.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 16 February 1998 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 85.215.189.29 is hosted by IONOS SE (AS8560) in Germany. Mail is handled by yfu-dk.mail.protection.outlook.com. 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 53ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.simply.com	2a02:2339:1:15c::4562:4562 91.197.248.78	ns1.simply.com ns1.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.simply.com	185.25.141.15 2a02:2339:4006:101::4562:4562	ns2.simply.com ns2.simply.com	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns3.simply.com	91.197.248.79	ns3.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 68ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
85.215.189.29	86400s	ip85.215.189.29.pbiaas.com	AS8560	IONOS SE	85.215.128.0/18	🇩🇪 Germany	—

📧 MX Records#

1 records 77ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	35571s	yfu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::10 2a01:111:f403:ca04::b 2a01:111:f403:ca09::a 2a01:111:f403:ca48::12 52.101.185.21 52.101.73.145 52.101.91.156 52.101.91.162	mail-dbapr03cu00100.inbound.protection.outlook.com mail-dbbpr03cu00103.inbound.protection.outlook.com mail-am7pr02cu00202.inbound.protection.outlook.com mail-miypr05cu00202.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-am6pr02cu00301.inbound.protection.outlook.com mail-maspr04cu00104.inbound.protection.outlook.com mail-matpr04cu00302.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 → 52.98.154.152
🔶 Autoconfig	yfu.dk → 85.215.189.29

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 236ms

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

✉️ SPF#

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

📨 DMARC#

Policy	Record (_dmarc.yfu.dk)
p=none (monitor only)	v=DMARC1; p=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 2026-10-12 17:38:13

www CNAME	yfu.dk (all on yfu.dk) → 85.215.189.29 (AS8560)
www vs bare domain	Same network yfu.dk: 85.215.189.29 (AS8560) www.yfu.dk: 85.215.189.29 (AS8560)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	Published: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.yfu.dk	dns.yfu.world

🔗 TLSA / DANE#

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

🔐 DNSSEC#

131ms

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

🏷️ SOA#

83ms

Field	Value
Serial	2026100300
Primary NS (MNAME)	ns1.simply.com
Responsible (RNAME)	hostmaster@simply.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-04 06:27:38

Field	Value
Registrar	Simply.com A/S
Registered	1998-02-16
Expires	2027-03-31 (163d)

📋 WHOIS#

⏱️ Lookup Timing#

53ms

68ms

77ms

AAAA

64ms

TXT

236ms

CAA

65ms

HTTPS

40ms

TLSA

772ms

SOA

83ms

MTA-STS

89ms

DNSSEC

131ms

SRV

99ms

Total

2024ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-12 17:38:13	3051ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-09 10:17:13 shown	2024ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-08 09:27:31	1407ms	3 NS 1 A 1 MX	🔓 Insecure
2026-10-04 05:43:53	1788ms	3 NS 1 A 1 MX	🔓 Insecure
2026-07-03 13:52:59	3215ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-29 21:04:58	1360ms	2 NS 1 A 1 MX	🔓 Insecure
2026-06-27 03:25:19	1750ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-17 11:55:41	3075ms	2 NS 1 A 1 MX	🔒 Secure