teoritjek.dk

📜 Historical scan 2026-09-24 05:25:14 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

teoritjek.dk is a .dk domain served by 2 nameservers (aspen.ns.cloudflare.com, kai.ns.cloudflare.com). It was registered on 2 April 2025 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.20.99 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx1.migadu.com, aspmx2.migadu.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 34ms

Nameserver	IP addresses	PTR	ASN / ISP
aspen.ns.cloudflare.com	108.162.194.109 162.159.38.109 172.64.34.109 2606:4700:50::a29f:266d 2803:f800:50::6ca2:c26d 2a06:98c1:50::ac40:226d	aspen.ns.cloudflare.com aspen.ns.cloudflare.com aspen.ns.cloudflare.com aspen.ns.cloudflare.com aspen.ns.cloudflare.com aspen.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
kai.ns.cloudflare.com	108.162.193.188 172.64.33.188 173.245.59.188 2606:4700:58::adf5:3bbc 2803:f800:50::6ca2:c1bc 2a06:98c1:50::ac40:21bc	kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.ns.cloudflare.com kai.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 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.20.99	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.192.17	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

2 records 43ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	aspmx1.migadu.com	135.125.171.180 135.125.222.87 2001:41d0:303:648a::1 2001:41d0:700:19b4::1 2001:41d0:700:1a57::1 51.38.57.138	ns3160119.ip-135-125-171.eu ns3160230.ip-135-125-222.eu — — — mizu0.migadu.com	AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS
20	300s	aspmx2.migadu.com	135.125.171.180 135.125.222.87 2001:41d0:303:648a::1 2001:41d0:700:19b4::1 2001:41d0:700:1a57::1 51.38.57.138	ns3160119.ip-135-125-171.eu ns3160230.ip-135-125-222.eu — — — mizu0.migadu.com	AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS AS16276 OVH SAS

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔶 Autoconfig	autoconfig.migadu.com → 141.94.97.141

🔷 AAAA Records (IPv6)#

2 records 46ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:c011	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:1463	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 41ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.20.99,172.67.192.17 ech=AEX+DQBBeQAgACDa54LTUwndqlIQMLIFxhmOAwxAamUkZM5x4k98EScBfQAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:c011,2606:4700:3034::6815:1463

🔌 SRV Records#

2 records 74ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	1	443	autodiscover.migadu.com
_imaps._tcp	0	1	993	imap.migadu.com

📝 TXT Records#

5 records 176ms

TXT Record
brevo-code:f0b98f8d6516becc3ae5966821b45e0c
google-site-verification=8FtPK25vMbKnPCoFvpnnQu_OOmB3IfFXm9J8CSP9JNg
google-site-verification=mSWkwDLCxFN9V63DEn85pC0WnuTCDPAFKxpFU38Sz0U
hosted-email-verify=vpwh5dxj
v=spf1 include:spf.migadu.com -all

✉️ SPF#

Policy	Record (teoritjek.dk)
-all (hard fail)	v=spf1 include:spf.migadu.com -all

📨 DMARC#

Policy	Record (_dmarc.teoritjek.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 2026-10-14 10:30:12

www	104.21.20.99 172.67.192.17 2606:4700:3033::ac43:c011 2606:4700:3034::6815:1463 (AS13335) (address records, no CNAME)
www vs bare domain	Same network teoritjek.dk: 104.21.20.99 172.67.192.17 2606:4700:3033::ac43:c011 2606:4700:3034::6815:1463 (AS13335) www.teoritjek.dk: 104.21.20.99 172.67.192.17 2606:4700:3033::ac43:c011 2606:4700:3034::6815:1463 (AS13335)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 5/10 · policy: -all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

91ms

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	2412834520
Primary NS (MNAME)	aspen.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-13 13:51:07

Field	Value
Registrar	ONE.COM A/S
Registered	2025-04-02
Expires	2027-04-01 (163d)

🔗 Same registrant#

2 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

Domain	Registrar
indoorgolflab.dk	ONE.COM A/S
yonasvalentin.dk	ONE.COM A/S

📋 WHOIS#

⏱️ Lookup Timing#

34ms

44ms

43ms

AAAA

46ms

TXT

176ms

CAA

41ms

HTTPS

41ms

TLSA

94ms

SOA

0ms

MTA-STS

80ms

DNSSEC

91ms

SRV

74ms

Total

697ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-14 10:30:11	767ms	2 NS 2 A 2 MX	🔓 Insecure
2026-10-13 09:53:56	3133ms	2 NS 2 A 2 MX	🔓 Insecure
2026-10-12 03:44:33	2696ms	2 NS 2 A 2 MX	🔓 Insecure
2026-10-11 01:53:23	3311ms	2 NS 2 A 2 MX	🔓 Insecure
2026-09-24 05:25:14 shown	697ms	2 NS 2 A 2 MX	🔓 Insecure
2026-08-22 06:43:21	9871ms	2 NS 2 A 2 MX	🔓 Insecure
2026-08-16 06:47:27	9543ms	2 NS 2 A 2 MX	🔓 Insecure
2026-08-14 14:26:55	10808ms	2 NS 2 A 2 MX	🔓 Insecure
2026-08-07 04:51:22	1779ms	2 NS 2 A 2 MX	🔓 Insecure
2026-07-17 08:29:08	9547ms	2 NS 2 A 2 MX	🔓 Insecure
2026-07-15 12:32:59	3364ms	2 NS 2 A 2 MX	🔓 Insecure
2026-06-27 18:33:42	2070ms	2 NS 2 A 2 MX	🔓 Insecure
2026-06-25 23:56:18	1250ms	2 NS 2 A 2 MX	🔓 Insecure
2026-06-18 08:02:51	894ms	2 NS 2 A 4 MX	🔓 Insecure