studentsonline.dk DNS records

🖥️ Nameservers2 records 87ms

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 Records2 records 79ms

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 80ms

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 Records1 records 85ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.15.17,172.67.161.5 ech=AEX+DQBB3gAgACCrNeffYBs54Ic9ySmupUCgFow0o7lg/fz5Dfsa4DNSIQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3035::6815:f11,2606:4700:3036::ac43:a105

📝 TXT Records1 records 322ms

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

🔏 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)

🔐 DNSSEC222ms

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

🏷️ SOA0ms

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

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

87ms

A

79ms

MX

74ms

AAAA

80ms

TXT

322ms

CAA

76ms

HTTPS

85ms

TLSA

85ms

SOA

0ms

MTA-STS

143ms

DNSSEC

222ms

SRV

132ms

Total

995ms

🕐 Scan History

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