cisu.dk

📜 Historical scan 2026-09-21 04:19:19 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cisu.dk is a .dk domain served by 2 nameservers (ns.dandomain.dk, ns2.dandomain.dk). It was registered on 26 January 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 89.188.78.221 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by cisu-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#

2 records 39ms

Nameserver	IP addresses	PTR	ASN / ISP
ns.dandomain.dk	185.25.141.3 2a02:2339:4006:109::dd	ns.dandomain.dk ns.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.dandomain.dk	2a02:2339:1:108::dd:dd 91.197.248.66	ns2.dandomain.dk ns2.dandomain.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 36ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
89.188.78.221	3600s	vdom88.net.dk2.zitcom.dk	AS48854	team.blue Denmark A/S	89.188.72.0/21	🇩🇰 Denmark	—

📧 MX Records#

1 records 39ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	cisu-dk.mail.protection.outlook.com	2a01:111:f403:ca04::d 2a01:111:f403:ca04::f 2a01:111:f403:ca09::24 2a01:111:f403:ca3c::a 52.101.209.31 52.101.68.15 52.101.68.18 52.101.68.29	mail-db6pr03cu00105.inbound.protection.outlook.com mail-db7pr03cu00507.inbound.protection.outlook.com mail-am6pr02cu00204.inbound.protection.outlook.com mail-zrxpr07cu00102.inbound.protection.outlook.com mail-cpjpr05cu00207.inbound.protection.outlook.com mail-db6pr03cu00107.inbound.protection.outlook.com mail-db4pr02cu00302.inbound.protection.outlook.com mail-dbapr03cu00105.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 → 40.104.116.56

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

4 records 110ms

TXT Record
google-site-verification=Rg4twrhFcOE32MtxFN0WuVHPCNC1eHi-qWC76YfwmiU
MS=8BCAB73387B731D79E8ED46AE70BBE8FE7174981
rl1t361v50p6jc884pp60q7rbp
v=spf1 a:gate1.sikkermail.nu a:gate2.sikkermail.nu include:spf.protection.outlook.com include:sendgrid.net -all

✉️ SPF#

Policy	Record (cisu.dk)
-all (hard fail)	v=spf1 a:gate1.sikkermail.nu a:gate2.sikkermail.nu include:spf.protection.outlook.com include:sendgrid.net -all

📨 DMARC#

Policy	Record (_dmarc.cisu.dk)
p=reject	v=DMARC1; p=reject; rua=mailto:dmarc@cisu.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 2026-10-08 08:04:15

www CNAME	cisu.dk (all on cisu.dk) → 89.188.78.221 (AS48854)
www vs bare domain	Same network cisu.dk: 89.188.78.221 (AS48854) www.cisu.dk: 89.188.78.221 (AS48854)
Wildcard	No
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

1 found

Selector	CNAME	Key
selector1	selector1-cisu-dk._domainkey.cisudk.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: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

70ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2025021301
Primary NS (MNAME)	ns.dandomain.dk
Responsible (RNAME)	hostmaster@dandomain.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-05 22:28:50

Field	Value
Registrar	DANDOMAIN A/S
Registered	2004-01-26
Expires	2027-01-31 (98d)

📋 WHOIS#

⏱️ Lookup Timing#

39ms

36ms

39ms

AAAA

37ms

TXT

110ms

CAA

50ms

HTTPS

34ms

TLSA

710ms

SOA

0ms

MTA-STS

49ms

DNSSEC

70ms

SRV

82ms

Total

1166ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-30 04:12:13	720ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-21 04:19:19 shown	1166ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-01 22:31:11	1275ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-22 01:18:05	720ms	2 NS 1 A 1 MX	🔒 Secure
2026-06-16 20:56:15	775ms	2 NS 1 A 1 MX	🔒 Secure