handelsskolensilkeborg.dk

📜 Historical scan 2026-09-16 05:20:11 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

handelsskolensilkeborg.dk is a .dk domain served by 3 nameservers (ns.efif.dk, ns2.efif.dk, ns3.efif.dk). It was registered on 2 March 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.245 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by handelsskolensilkeborg-dk.mail.protection.outlook.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#

3 records 81ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.efif.dk	195.254.168.23	ns.efif.dk	AS51073 Aarhus Business College
ns2.efif.dk	195.254.168.12	ns2.efif.dk	AS51073 Aarhus Business College
ns3.efif.dk	20.23.170.35	—	AS8075 Microsoft Corporation

🌍 A Records#

1 records 60ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.42.245	86400s	—	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

1 records 69ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	handelsskolensilkeborg-dk.mail.protection.outlook.com	2a01:111:f403:c967::c 2a01:111:f403:ca04::7 2a01:111:f403:ca04::8 2a01:111:f403:ca04::a 52.101.103.36 52.101.185.21 52.101.209.28 52.101.91.156	mail-cpjpr05cu00204.inbound.protection.outlook.com mail-db4pr02cu00307.inbound.protection.outlook.com mail-db5pr02cu00100.inbound.protection.outlook.com mail-du0pr03cu00102.inbound.protection.outlook.com mail-miypr05cu00104.inbound.protection.outlook.com mail-zrxpr05cu00105.inbound.protection.outlook.com mail-cpjpr05cu00104.inbound.protection.outlook.com mail-maspr04cu00104.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

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 99ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	10	10	443	webmail.efif.dk

📝 TXT Records#

4 records 233ms

TXT Record
0gyeO3SiZ4gh4D8ngau758uAjCMuGVvGGZwlLBmQ5Ras72metZexLsmB62+WtrWD26rQf9A6fgbPvm8zzlm/bg==
Handelsskolen Silkeborg
MS=ms37712184
v=spf1 redirect=_spf.efif.dk

✉️ SPF#

Policy	Record (handelsskolensilkeborg.dk)
redirect=_spf.efif.dk	v=spf1 redirect=_spf.efif.dk

📨 DMARC#

Policy	Record (_dmarc.handelsskolensilkeborg.dk)
p=reject	v=DMARC1; p=reject; pct=100; ruf=mailto:analyze@efif.dk; rua=mailto:analyze@efif.dk

📬 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 2026-10-20 15:06:38

www	185.21.42.245 (AS48854) (address records, no CNAME)
www vs bare domain	Same network handelsskolensilkeborg.dk: 185.21.42.245 (AS48854) www.handelsskolensilkeborg.dk: 185.21.42.245 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 50 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
selector1	selector1-handelsskolensilkeborg-dk._domainkey.efif.onmicrosoft.com	RSA · ~1024 bit below 2048 bit
selector2	selector2-handelsskolensilkeborg-dk._domainkey.efif.onmicrosoft.com	RSA · ~1024 bit below 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#

169ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2012012458
Primary NS (MNAME)	ns.efif.dk
Responsible (RNAME)	dns-zc@efif.dk
Refresh	14400s
Retry	3600s
Expire	2419200s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-14 02:09:20

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2010-03-02
Expires	2027-03-31 (161d)

🔗 Same registrant#

13 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).

Domain	Registrar
c360.dk	Punktum dk A/S (direct)
college360.dk	Punktum dk A/S (direct)
handelsskolen-silkeborg.dk	Punktum dk A/S (direct)
hssilke.dk	Punktum dk A/S (direct)
hssilkeborg.dk	Punktum dk A/S (direct)
hsskyen.dk	Punktum dk A/S (direct)
kursuscenteret.dk	Punktum dk A/S (direct)
learnsilkeborg.dk	Punktum dk A/S (direct)
piu-sekretariatet.dk	Punktum dk A/S (direct)
piu.dk	Punktum dk A/S (direct)
silkeborg-handelsskole.dk	Punktum dk A/S (direct)
silkeborghs.dk	Punktum dk A/S (direct)
silkehs.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

81ms

60ms

69ms

AAAA

83ms

TXT

233ms

CAA

70ms

HTTPS

72ms

TLSA

379ms

SOA

0ms

MTA-STS

91ms

DNSSEC

169ms

SRV

99ms

Total

1403ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-20 15:06:38	505ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-15 04:14:12	1508ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-14 01:48:57	1148ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-08 07:20:17	3103ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-06 03:38:13	1189ms	3 NS 1 A 1 MX	🔒 Secure
2026-10-03 03:19:42	1574ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-30 03:05:48	738ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-28 04:08:28	2150ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-27 03:33:48	2511ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-26 03:18:01	5120ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-23 16:16:06	2394ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-16 05:20:11 shown	1403ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-11 19:53:18	2633ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-10 10:57:55	1412ms	3 NS 1 A 1 MX	🔒 Secure
2026-09-09 04:34:26	1202ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-31 02:34:03	933ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-28 10:00:32	1656ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-26 19:53:47	1132ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-24 17:41:50	3855ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-19 13:00:27	3368ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-17 06:20:32	6715ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-13 06:29:51	5762ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-09 17:50:26	25797ms	3 NS 1 A 1 MX	🔒 Secure
2026-08-01 16:30:34	9081ms	3 NS 1 A 1 MX	🔒 Secure
2026-07-27 02:47:43	4085ms	3 NS 1 A 1 MX	🔒 Secure