skbu.dk

📜 Historical scan 2026-06-20 20:40:10  ·  ← Latest scan
⬇ Zone File 📜 Timeline & History ⚡ Scan Now

skbu.dk is a .dk domain served by 3 nameservers (ns1.simply.com, ns2.simply.com, ns3.simply.com). It was registered on 11 November 2022 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by skbu-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   200ms
NameserverIP addressesPTRASN / 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#

🌍
No A records found

📧 MX Records#

1 records   198ms
PriorityTTLMail ServerIP addressesPTRASN
10 2993s skbu-dk.mail.protection.outlook.com 2a01:111:f403:ca04::e
2a01:111:f403:ca09::2
2a01:111:f403:ca09::20
2a01:111:f403:ca09::7
52.101.68.27
52.101.68.3
52.101.68.32
52.101.73.2		 mail-db8pr02cu00106.inbound.protection.outlook.com
mail-am0pr83cu00402.inbound.protection.outlook.com
mail-as8pr05cu00400.inbound.protection.outlook.com
mail-am9pr04cu00107.inbound.protection.outlook.com
mail-db7pr03cu00503.inbound.protection.outlook.com
mail-db7pr03cu00403.inbound.protection.outlook.com
mail-db3pr0202cu00200.inbound.protection.outlook.com
mail-as9pr07cu00302.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#

ServiceCNAME / IP
🔷 Autodiscoverautodiscover.outlook.com → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records   319ms
ServicePriorityWeightPortTarget
_sipfederationtls._tcp 100 1 5061 sipfed.online.lync.com

📝 TXT Records#

2 records   716ms
TXT Record
MS=ms49705760
v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

✉️ SPF#

PolicyRecord (skbu.dk)
-all (hard fail) v=spf1 include:spf.protection.outlook.com include:spf.simply.com -all

📨 DMARC#

PolicyRecord (_dmarc.skbu.dk)
p=reject v=DMARC1; p=reject; fo=1

📬 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 2026-10-13 09:17:15
wwwNXDOMAIN
www vs bare domainNeither resolves
skbu.dk: no address
www.skbu.dk: no address
WildcardNo
Denial of existenceNSEC zone can be walked (all names enumerable)
CDS / CDNSKEYPublished: key rollovers can be automated with the registry (RFC 7344/8078) 1 CDS, 1 CDNSKEY

✍️ DKIM keys#

1 found
SelectorCNAMEKey
selector1 selector1-skbu-dk._domainkey.skoleskanderborg.onmicrosoft.com 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#

456ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsresolution failed: ncache nxrrset

🏷️ SOA#

249ms
FieldValue
Serial2024070402
Primary NS (MNAME)ns1.simply.com
Responsible (RNAME)hostmaster@simply.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)3600s

📋 Registration#

WHOIS fetched 2026-10-13 09:45:08
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2022-11-11
Expires2026-11-10 (23d)

🔗 Same registrant#

23 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).

DomainRegistrar
brvskole.dkPunktum dk A/S (direct)
diaprivatskole.dkPunktum dk A/S (direct)
diaps.dkPunktum dk A/S (direct)
easyiqcloud.dkPunktum dk A/S (direct)
edupass.dkPunktum dk A/S (direct)
egeskoledrev.dkPunktum dk A/S (direct)
egeskoler365.dkPunktum dk A/S (direct)
fanoskole.dkPunktum dk A/S (direct)
faxeskole.dkPunktum dk A/S (direct)
gsnsvejle.dkPunktum dk A/S (direct)
hhskole.dkSimply.com A/S
hsko.dkPunktum dk A/S (direct)
kertemindeskoler.dkPunktum dk A/S (direct)
læringsplatformen.dkPunktum dk A/S (direct)
meddelelsesbogen.dkPunktum dk A/S (direct)
netskolen.dkSimply.com A/S
odderskole.dkPunktum dk A/S (direct)
proiq.dkSimply.com A/S
rs-lilleskole.dkSimply.com A/S
skivedna.dkPunktum dk A/S (direct)
skole3600.dkPunktum dk A/S (direct)
skolehk2.dkPunktum dk A/S (direct)
tkfri.dkPunktum dk A/S (direct)
📋 WHOIS#

⏱️ Lookup Timing#

NS
200ms
A
189ms
MX
198ms
AAAA
165ms
TXT
716ms
CAA
150ms
HTTPS
243ms
TLSA
259ms
SOA
249ms
MTA-STS
174ms
DNSSEC
456ms
SRV
319ms
Total
2487ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-13 09:17:15 1464ms 3 NS 0 A 1 MX 🔒 Secure
2026-10-08 19:05:12 842ms 3 NS 0 A 1 MX 🔒 Secure
2026-10-03 00:17:56 1449ms 3 NS 0 A 1 MX 🔒 Secure
2026-09-23 22:29:16 703ms 3 NS 0 A 1 MX 🔒 Secure
2026-07-01 09:40:41 872ms 3 NS 0 A 1 MX 🔒 Secure
2026-06-20 20:40:10 shown 2487ms 3 NS 0 A 1 MX 🔒 Secure
2026-06-18 06:04:46 1084ms 3 NS 0 A 1 MX 🔒 Secure
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