onlineteori.dk

📜 Historical scan 2026-09-24 03:56:27 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

onlineteori.dk is a .dk domain served by 2 nameservers (jessica.ns.cloudflare.com, quinton.ns.cloudflare.com). It was registered on 31 January 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.85.103 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by spam.micusto.com. The zone is not DNSSEC-signed, publishes a 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 37ms

Nameserver	IP addresses	PTR	ASN / ISP
jessica.ns.cloudflare.com	108.162.192.171 172.64.32.171 173.245.58.171 2606:4700:50::adf5:3aab 2803:f800:50::6ca2:c0ab 2a06:98c1:50::ac40:20ab	jessica.ns.cloudflare.com jessica.ns.cloudflare.com jessica.ns.cloudflare.com jessica.ns.cloudflare.com jessica.ns.cloudflare.com jessica.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
quinton.ns.cloudflare.com	108.162.195.249 162.159.44.249 172.64.35.249 2606:4700:58::a29f:2cf9 2803:f800:50::6ca2:c3f9 2a06:98c1:50::ac40:23f9	quinton.ns.cloudflare.com quinton.ns.cloudflare.com quinton.ns.cloudflare.com quinton.ns.cloudflare.com quinton.ns.cloudflare.com quinton.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 37ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.85.103	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.204.116	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

1 records 42ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	spam.micusto.com	94.237.28.65	spam.micusto.com	AS202053 UpCloud Ltd

🔷 AAAA Records (IPv6)#

2 records 55ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:5567	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::ac43:cc74	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 44ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.85.103,172.67.204.116 ech=AEX+DQBBfQAgACCK0/W35gUlzutdfJWYmm+BU1Xs4VEXEIjo0oPtjeIuYwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:5567,2606:4700:3034::ac43:cc74

📝 TXT Records#

4 records 173ms

TXT Record
brevo-code:69f6d0a7976a51d0ce312f96975b3466
google-gws-recovery-domain-verification=56979507
google-site-verification=FmmbHtDnQE8PR21R7r7OnBIB8rHa6EsTOUwu4XPGTD0
v=spf1 mx include:_spf.dcmediahosting.com include:spf.mailjet.com ~all

✉️ SPF#

Policy	Record (onlineteori.dk)
~all (soft fail)	v=spf1 mx include:_spf.dcmediahosting.com include:spf.mailjet.com ~all

📨 DMARC#

Policy	Record (_dmarc.onlineteori.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com

📬 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 14:00:58

www	104.21.85.103 172.67.204.116 2606:4700:3032::6815:5567 2606:4700:3034::ac43:cc74 (AS13335) (address records, no CNAME)
www vs bare domain	Same network onlineteori.dk: 104.21.85.103 172.67.204.116 2606:4700:3032::6815:5567 2606:4700:3034::ac43:cc74 (AS13335) www.onlineteori.dk: 104.21.85.103 172.67.204.116 2606:4700:3032::6815:5567 2606:4700:3034::ac43:cc74 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 4/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

116ms

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	2415357695
Primary NS (MNAME)	jessica.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-06 02:07:13

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2009-01-31
Expires	2027-01-31 (95d)

📋 WHOIS#

⏱️ Lookup Timing#

37ms

42ms

AAAA

55ms

TXT

173ms

CAA

45ms

HTTPS

44ms

TLSA

163ms

SOA

0ms

MTA-STS

59ms

DNSSEC

116ms

SRV

68ms

Total

1946ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 14:00:58	1137ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-30 07:59:38	543ms	2 NS 2 A 1 MX	🔓 Insecure
2026-09-24 03:56:27 shown	1946ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-27 03:54:54	10154ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-24 23:22:27	9491ms	2 NS 2 A 1 MX	🔓 Insecure
2026-08-23 22:55:10	1021ms	2 NS 2 A 1 MX	❓ Unknown
2026-07-23 15:11:50	1508ms	2 NS 2 A 1 MX	🔓 Insecure
2026-07-20 00:06:35	25741ms	2 NS 2 A 1 MX	🔓 Insecure
2026-06-17 13:23:00	2383ms	2 NS 2 A 1 MX	🔓 Insecure