3si.dk

Records from scan: 2026-10-01 02:20:15 · 794ms total · last checked 2026-10-15 21:42 (unchanged)

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

3si.dk is a .dk domain served by 2 nameservers (ns1.aveo.dk, ns2.aveo.dk). It was registered on 10 July 2026 (WHOIS) and first appeared in the .dk zone on 11 July 2026. Its website address 212.237.249.16 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by 3si-dk.mail.protection.outlook.com. The zone is DNSSEC-signed and validates, has no DMARC policy and has no IPv6 address. Below are all of its DNS records from our latest scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 52ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.aveo.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.aveo.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 45ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
212.237.249.16	3600s	splash.curanet.dk	AS48854	team.blue Denmark A/S	212.237.248.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	3si-dk.mail.protection.outlook.com	2a01:111:f403:c967:: 2a01:111:f403:c967::2 2a01:111:f403:c967::4 2a01:111:f403:c967::6 52.101.209.2 52.101.209.4 52.101.209.6 52.101.209.74	mail-cpcp307cu00400.inbound.protection.outlook.com mail-cpap307cu00402.inbound.protection.outlook.com mail-cpap307cu00204.inbound.protection.outlook.com mail-cpcp307cu00206.inbound.protection.outlook.com mail-cpap307cu00402.inbound.protection.outlook.com mail-cpap307cu00204.inbound.protection.outlook.com mail-cpcp307cu00206.inbound.protection.outlook.com mail-cpcp307cu00402.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 → 40.104.116.24
🔶 Autoconfig	212.237.249.16

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 204ms

TXT Record
MS=ms97243796
v=spf1 include:spf.protection.outlook.com -all

✉️ SPF#

Policy	Record (3si.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com -all

📨 DMARC#

✗ No DMARC record — mail spoofing not restricted

📬 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#

checked 2026-10-09 06:15:10

www	212.237.249.16 (AS48854) (address records, no CNAME)
www vs bare domain	Same network 3si.dk: 212.237.249.16 (AS48854) www.3si.dk: 212.237.249.16 (AS48854)
Wildcard	Yes: any name under the zone resolves
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#

2 found

Selector	CNAME	Key
selector1	selector1-3si-dk._domainkey.3sidk.w-v1.dkim.mail.microsoft	RSA · ~2048 bit
selector2	selector2-3si-dk._domainkey.3sidk.w-v1.dkim.mail.microsoft	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: 1/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

146ms

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

🏷️ SOA#

44ms

Field	Value
Serial	2026071007
Primary NS (MNAME)	ns1.aveo.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

WHOIS fetched 2026-10-09 07:53:34

Field	Value
Registrar	CURANET A/S
Registered	2026-07-10
Expires	2027-07-09 (265d)

📋 WHOIS#

⏱️ Lookup Timing#

52ms

45ms

57ms

AAAA

30ms

TXT

204ms

CAA

81ms

HTTPS

71ms

TLSA

235ms

SOA

44ms

MTA-STS

75ms

DNSSEC

146ms

SRV

65ms

Total

794ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 02:20:15 shown	794ms	2 NS 1 A 1 MX	🔒 Secure
2026-09-25 06:44:27	1122ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-27 08:53:45	854ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-25 09:07:23	1372ms	2 NS 1 A 1 MX	🔒 Secure
2026-08-16 13:42:10	2068ms	2 NS 1 A 1 MX	🔒 Secure
2026-07-11 08:40:17	1356ms	2 NS 1 A 1 MX	🔒 Secure