mdteacher.dk

📜 Historical scan 2026-08-21 11:22:23 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

mdteacher.dk is a .dk domain served by 2 nameservers (elmo.ns.cloudflare.com, zara.ns.cloudflare.com). It was registered on 10 April 2019 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.50.195 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. 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 64ms

Nameserver	IP addresses	PTR	ASN / ISP
elmo.ns.cloudflare.com	108.162.193.163 172.64.33.163 173.245.59.163 2606:4700:58::adf5:3ba3 2803:f800:50::6ca2:c1a3 2a06:98c1:50::ac40:21a3	elmo.ns.cloudflare.com elmo.ns.cloudflare.com elmo.ns.cloudflare.com elmo.ns.cloudflare.com elmo.ns.cloudflare.com elmo.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
zara.ns.cloudflare.com	108.162.192.148 172.64.32.148 173.245.58.148 2606:4700:50::adf5:3a94 2803:f800:50::6ca2:c094 2a06:98c1:50::ac40:2094	zara.ns.cloudflare.com zara.ns.cloudflare.com zara.ns.cloudflare.com zara.ns.cloudflare.com zara.ns.cloudflare.com zara.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 78ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.50.195	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.210.8	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

5 records 53ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	142.250.147.27 2a00:1450:4025:c03::1b	rd-in-f27.1e100.net rc-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt1.aspmx.l.google.com	192.178.158.27 2404:6800:4013:813::1a	lcdels-in-f27.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt2.aspmx.l.google.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1a	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1b	yukulwh-in-f27.1e100.net mad01s14-in-f27.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	300s	alt4.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1b	so-in-f26.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	91.221.196.226
🔶 Autoconfig	91.221.196.226

🔷 AAAA Records (IPv6)#

2 records 73ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3033::ac43:d208	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::6815:32c3	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 79ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.50.195,172.67.210.8 ech=AEX+DQBBJwAgACAfG7/J5+lTxKMOKZp9lVJ5kgkFaR2JKz90JTHCujfwQAAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:d208,2606:4700:3037::6815:32c3

📝 TXT Records#

4 records 286ms

TXT Record
ca3-5625a7c10a224b81806c634f1eeb5b40
google-site-verification=DJQoO1gRmvq_nJBq8zarbArAx4pnYEPISTNqVtZi9nY
google-site-verification=tyGoc9qpv1uebvYCVKH98CxnbtJpyPTDrpjF3yIUhJ4
klaviyo-site-verification=XFMw8g

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

Policy	Record (_dmarc.mdteacher.dk)
p=none (monitor only)	v=DMARC1; p=none; fo=1; rua=mailto:info@mdteacher.dk

📬 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 2026-10-22 19:30:29

www	104.21.50.195 172.67.210.8 2606:4700:3033::ac43:d208 2606:4700:3037::6815:32c3 (AS13335) (address records, no CNAME)
www vs bare domain	Same network mdteacher.dk: 104.21.50.195 172.67.210.8 2606:4700:3033::ac43:d208 2606:4700:3037::6815:32c3 (AS13335) www.mdteacher.dk: 104.21.50.195 172.67.210.8 2606:4700:3033::ac43:d208 2606:4700:3037::6815:32c3 (AS13335)
Wildcard	Yes: any name under the zone resolves

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.mdteacher.dk	mdteacher.dk.kinstavalidation.app

🔗 TLSA / DANE#

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

🔐 DNSSEC#

156ms

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	2412704161
Primary NS (MNAME)	elmo.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-20 11:12:27

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2019-04-10
Expires	2035-04-30 (3111d)

📋 WHOIS#

⏱️ Lookup Timing#

64ms

78ms

53ms

AAAA

73ms

TXT

286ms

CAA

70ms

HTTPS

79ms

TLSA

140ms

SOA

0ms

MTA-STS

94ms

DNSSEC

156ms

SRV

8089ms

Total

10425ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-22 19:30:29	695ms	2 NS 2 A 5 MX	🔓 Insecure
2026-10-20 10:48:12	3438ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-30 11:11:49	896ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-06 23:05:12	954ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-27 02:25:20	984ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-22 11:53:16	9707ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-21 11:22:23 shown	10425ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-04 22:34:32	2226ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-19 18:37:49	1048ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-17 23:09:46	16414ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-17 23:02:00	20159ms	2 NS 2 A 5 MX	🔓 Insecure