s-inst.dk

📜 Historical scan 2026-08-29 17:05:45 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

s-inst.dk is a .dk domain served by 2 nameservers (barbara.ns.cloudflare.com, justin.ns.cloudflare.com). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.6.238 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by sinst-dk0c.mail.protection.outlook.com. The zone is not DNSSEC-signed, has no DMARC policy and is reachable over IPv6. 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 33ms

Nameserver	IP addresses	PTR	ASN / ISP
barbara.ns.cloudflare.com	108.162.192.248 172.64.32.248 173.245.58.248 2606:4700:50::adf5:3af8 2803:f800:50::6ca2:c0f8 2a06:98c1:50::ac40:20f8	barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com barbara.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
justin.ns.cloudflare.com	108.162.193.187 172.64.33.187 173.245.59.187 2606:4700:58::adf5:3bbb 2803:f800:50::6ca2:c1bb 2a06:98c1:50::ac40:21bb	justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com justin.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 28ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.6.238	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.135.119	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 34ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	sinst-dk0c.mail.protection.outlook.com	2a01:111:f403:ca04::8 2a01:111:f403:ca09::9 2a01:111:f403:ca09::b 2a01:111:f403:ca48::a 52.101.103.137 52.101.68.5 52.101.73.11 52.101.73.8	mail-db5pr02cu00100.inbound.protection.outlook.com mail-as8pr04cu00801.inbound.protection.outlook.com mail-am7pr05cu00103.inbound.protection.outlook.com mail-miypr02cu00202.inbound.protection.outlook.com mail-miypr02cu00101.inbound.protection.outlook.com mail-du2pr03cu00105.inbound.protection.outlook.com mail-am1pr04cu00103.inbound.protection.outlook.com mail-am0pr04cu00500.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)#

2 records 28ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3030::ac43:8777	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:6ee	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 27ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.6.238,172.67.135.119 ech=AEX+DQBBeQAgACAV+ZluLg002WcJ+6hD4/CA0Rwn2Oc37c8CNEzr8wD0EgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3030::ac43:8777,2606:4700:3034::6815:6ee

📝 TXT Records#

2 records 140ms

TXT Record
MS=ms94907939
v=spf1 include:spf.protection.outlook.com include:spf.curanet.dk ip4:193.8.36.0/22 -all

✉️ SPF#

Policy	Record (s-inst.dk)
-all (hard fail)	v=spf1 include:spf.protection.outlook.com include:spf.curanet.dk ip4:193.8.36.0/22 -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#

latest probe, not this scan · checked 2026-10-09 19:11:08

www	104.21.6.238 172.67.135.119 2606:4700:3030::ac43:8777 2606:4700:3034::6815:6ee (AS13335) (address records, no CNAME)
www vs bare domain	Same network s-inst.dk: 104.21.6.238 172.67.135.119 2606:4700:3030::ac43:8777 2606:4700:3034::6815:6ee (AS13335) www.s-inst.dk: 104.21.6.238 172.67.135.119 2606:4700:3030::ac43:8777 2606:4700:3034::6815:6ee (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.s-inst.dk	I5vGA-WhWRRiyn7-54I0LKmgxz_sJyGMSLp4ESwi0mk
TXT	_acme-challenge.s-inst.dk	dd-WGsFnbIb6hY-6w0oADoMQKtQQO-QRflLn4ZmV3TI

🔗 TLSA / DANE#

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

🔐 DNSSEC#

98ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2413435714
Primary NS (MNAME)	barbara.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

33ms

28ms

34ms

AAAA

28ms

TXT

140ms

CAA

31ms

HTTPS

27ms

TLSA

384ms

SOA

0ms

MTA-STS

42ms

DNSSEC

98ms

SRV

74ms

Total

1250ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 11:37:14	1080ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-26 19:38:53	10236ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-16 07:24:21	1399ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-04 13:40:53	2100ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-29 17:05:45 shown	1250ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-28 07:21:34	1224ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-18 12:17:09	1474ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-18 04:26:12	1725ms	2 NS 2 A 1 MX	🔓 Insecure