studentsonline.dk

📜 Historical scan 2026-09-25 07:47:36 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

studentsonline.dk is a .dk domain served by 2 nameservers (hank.ns.cloudflare.com, olga.ns.cloudflare.com). It was registered on 26 August 2020 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.15.17 is hosted by Cloudflare, Inc. (AS13335). 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
hank.ns.cloudflare.com	108.162.193.116 172.64.33.116 173.245.59.116 2606:4700:58::adf5:3b74 2803:f800:50::6ca2:c174 2a06:98c1:50::ac40:2174	hank.ns.cloudflare.com hank.ns.cloudflare.com hank.ns.cloudflare.com hank.ns.cloudflare.com hank.ns.cloudflare.com hank.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
olga.ns.cloudflare.com	108.162.192.137 172.64.32.137 173.245.58.137 2606:4700:50::adf5:3a89 2803:f800:50::6ca2:c089 2a06:98c1:50::ac40:2089	olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.ns.cloudflare.com olga.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 60ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.15.17	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.161.5	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

📧

No MX records found

🔷 AAAA Records (IPv6)#

2 records 70ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3035::6815:f11	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3036::ac43:a105	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 61ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.15.17,172.67.161.5 ech=AEX+DQBBRwAgACDa4MZBhpIbg79QlzivHh6VMzOryIkPAWD3biwyXkaQBAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:f11,2606:4700:3036::ac43:a105

📝 TXT Records#

1 records 208ms

TXT Record
v=spf1 ip4:77.233.252.243 ip4:77.233.252.244 ip4:77.233.252.245 ip4:77.233.252.248 ip4:83.89.199.62 ip4:62.243.73.0/24 ip4:77.32.175.81 ip4:212.27.13.241 include:spf.protection.outlook.com include:spf.webcrm.com include:spf.sendinblue.com mx -all

✉️ SPF#

Policy	Record (studentsonline.dk)
-all (hard fail)	v=spf1 ip4:77.233.252.243 ip4:77.233.252.244 ip4:77.233.252.245 ip4:77.233.252.248 ip4:83.89.199.62 ip4:62.243.73.0/24 ip4:77.32.175.81 ip4:212.27.13.241 include:spf.protection.outlook.com include:spf.webcrm.com include:spf.sendinblue.com mx -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 2026-10-11 10:06:19

www	104.21.15.17 172.67.161.5 2606:4700:3035::6815:f11 2606:4700:3036::ac43:a105 (AS13335) (address records, no CNAME)
www vs bare domain	Same network studentsonline.dk: 104.21.15.17 172.67.161.5 2606:4700:3035::6815:f11 2606:4700:3036::ac43:a105 (AS13335) www.studentsonline.dk: 104.21.15.17 172.67.161.5 2606:4700:3035::6815:f11 2606:4700:3036::ac43:a105 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.studentsonline.dk	qwSQPrp_xVzgu9hdjUhvkHWO4ApPx59dW3GORSYJpJ4
TXT	_acme-challenge.studentsonline.dk	y6l1hVyKePDO6sOSUz_J1oaXo1Kk5ZKOvjj2uER6Ews

🔗 TLSA / DANE#

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

🔐 DNSSEC#

95ms

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	2413065058
Primary NS (MNAME)	hank.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-03 02:54:36

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2020-08-26
Expires	2027-08-31 (315d)

📋 WHOIS#

⏱️ Lookup Timing#

33ms

60ms

47ms

AAAA

70ms

TXT

208ms

CAA

33ms

HTTPS

61ms

TLSA

57ms

SOA

0ms

MTA-STS

81ms

DNSSEC

95ms

SRV

71ms

Total

563ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-07 04:51:59	464ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-03 02:31:43	809ms	2 NS 2 A 0 MX	🔓 Insecure
2026-10-01 02:18:49	449ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-25 07:47:36 shown	563ms	2 NS 2 A 0 MX	🔓 Insecure
2026-09-03 21:04:02	9461ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-25 12:37:57	995ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-09 16:26:20	922ms	2 NS 2 A 0 MX	🔓 Insecure
2026-08-07 03:44:05	1157ms	2 NS 2 A 0 MX	🔓 Insecure
2026-07-31 20:18:36	16689ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-28 02:39:59	1201ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-24 04:34:10	943ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-21 10:29:24	1210ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-20 03:17:38	879ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-19 22:20:15	4345ms	2 NS 2 A 0 MX	🔓 Insecure
2026-06-17 14:04:38	2306ms	2 NS 2 A 0 MX	🔓 Insecure