dfsu.dk

📜 Historical scan 2026-08-28 02:00:59 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

dfsu.dk is a .dk domain served by 4 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com and 1 more). It was registered on 21 July 2000 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 93.191.156.121 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by smtp.google.com. The zone is DNSSEC-signed and validates, 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#

4 records 58ms

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
ns4.simply.com	91.197.248.80	ns4.simply.com	AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 68ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
93.191.156.121	3600s	linux240.unoeuro.com	AS48854	team.blue Denmark A/S	93.191.152.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 73ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	smtp.google.com	142.250.150.27 142.251.1.26 142.251.1.27 2a00:1450:4010:c05::1a 2a00:1450:4010:c05::1a 2a00:1450:4010:c1c::1b 2a00:1450:4010:c1e::1a 2a00:1450:4010:c1e::1b 64.233.162.26 64.233.162.27	la-in-f27.1e100.net lb-in-f26.1e100.net lb-in-f27.1e100.net li-in-f26.1e100.net li-in-x1a.1e100.net la-in-f27.1e100.net lb-in-f26.1e100.net lb-in-f27.1e100.net li-in-f26.1e100.net li-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	93.191.156.121
🔶 Autoconfig	maildiscover.simply.com → 94.231.108.222

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 80ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	maildiscover.simply.com

📝 TXT Records#

3 records 200ms

TXT Record
google-site-verification=4yHzfw4wIXfA_XD1cnT6sjAZVeTjLadDo0vkAdE6otU
google-site-verification=yTm8XET4y7CMS-RPFyjInsFP5n6mEuAVJ4FHlOVvM04
v=spf1 include:_spf.google.com include:spf.simply.com -all

✉️ SPF#

Policy	Record (dfsu.dk)
-all (hard fail)	v=spf1 include:_spf.google.com include:spf.simply.com -all

📨 DMARC#

Policy	Record (_dmarc.dfsu.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 2026-10-14 13:41:29

www	94.231.103.100 (AS48854) (address records, no CNAME)
www vs bare domain	Same network dfsu.dk: 93.191.156.121 (AS48854) www.dfsu.dk: 94.231.103.100 (AS48854)
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: 2/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

118ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2025042300
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 2026-10-12 20:50:36

Field	Value
Registrar	Simply.com A/S
Registered	2000-07-21
Expires	2028-09-30 (713d)

🔗 Same registrant#

0 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).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

58ms

68ms

73ms

AAAA

72ms

TXT

200ms

CAA

52ms

HTTPS

50ms

TLSA

101ms

SOA

0ms

MTA-STS

90ms

DNSSEC

118ms

SRV

80ms

Total

868ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 02:26:26	1511ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-30 02:16:52	489ms	4 NS 1 A 1 MX	🔒 Secure
2026-09-08 01:02:43	516ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-28 02:00:59 shown	868ms	4 NS 1 A 1 MX	🔒 Secure
2026-08-25 20:22:20	673ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-23 18:36:54	977ms	4 NS 1 A 1 MX	🔒 Secure
2026-06-23 04:29:13	1049ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-17 02:35:24	2388ms	4 NS 1 A 1 MX	🔒 Secure