mdteacher.dk

📜 Historical scan 2026-10-20 10:48:12  ·  ← 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   185ms
NameserverIP addressesPTRASN / 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   192ms
IPTTLPTRASNISP / OrgCIDRCountryCity
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   151ms
PriorityTTLMail ServerIP addressesPTRASN
1 300s aspmx.l.google.com 142.251.127.26
2a00:1450:4001:c21::1b		 lcfrai-in-f26.1e100.net
lcfrai-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 300s alt1.aspmx.l.google.com 142.250.147.26
2a00:1450:4025:c01::1a		 rd-in-f26.1e100.net
rd-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
5 300s alt2.aspmx.l.google.com 172.253.152.26
2a00:1450:4010:c22::1a		 yulpptr-in-f26.1e100.net
yulpptr-in-f26.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 300s alt3.aspmx.l.google.com 192.179.20.27
2404:6800:4000:1027::1b		 ncboms-in-f27.1e100.net
ncboms-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC
10 300s alt4.aspmx.l.google.com 192.178.158.27
2404:6800:4013:813::1b		 lcdels-in-f27.1e100.net
lcdels-in-f27.1e100.net		 AS15169 Google LLC
AS15169 Google LLC

📧 Autodiscover / Autoconfig#

ServiceCNAME / IP
🔷 Autodiscover91.221.196.226
🔶 Autoconfig91.221.196.226

🔷 AAAA Records (IPv6)#

2 records   166ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
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   160ms
PriorityTargetSvcParams
1 service . alpn="h3,h2" ipv4hint=104.21.50.195,172.67.210.8 ech=AEX+DQBB2QAgACAHUuPO4M0kyLkBBGdpJJ0TaEuvfikTUJJaVYJj+LdhFgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3033::ac43:d208,2606:4700:3037::6815:32c3

📝 TXT Records#

5 records   412ms
TXT Record
ca3-5625a7c10a224b81806c634f1eeb5b40
google-site-verification=DJQoO1gRmvq_nJBq8zarbArAx4pnYEPISTNqVtZi9nY
google-site-verification=L5H5LQKithSajbD_ehkCUI_TTNy4bGpO0zy_vTHoeU4
google-site-verification=tyGoc9qpv1uebvYCVKH98CxnbtJpyPTDrpjF3yIUhJ4
klaviyo-site-verification=XFMw8g

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 DMARC#

PolicyRecord (_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 2026-10-23 20:41:09
www104.21.50.195 172.67.210.8 2606:4700:3033::ac43:d208 2606:4700:3037::6815:32c3 (AS13335) (address records, no CNAME)
www vs bare domainSame network
WildcardYes: any name under the zone resolves

✍️ DKIM keys#

1 found
SelectorCNAMEKey
google — RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔏 ACME Challenge#

TypeNameValue
CNAME _acme-challenge.mdteacher.dk mdteacher.dk.kinstavalidation.app

🔗 TLSA / DANE#

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

🔐 DNSSEC#

231ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer

🏷️ SOA#

65ms
FieldValue
Serial2417953266
Primary NS (MNAME)elmo.ns.cloudflare.com
Responsible (RNAME)dns@cloudflare.com
Refresh10000s
Retry2400s
Expire604800s
Minimum (neg-cache TTL)1800s

📋 Registration#

WHOIS fetched 2026-10-20 11:12:27
FieldValue
RegistrarPunktum dk A/S (direct)
Registered2019-04-10
Expires2035-04-30 (3109d)
📋 WHOIS#

⏱️ Lookup Timing#

NS
185ms
A
192ms
MX
151ms
AAAA
166ms
TXT
412ms
CAA
178ms
HTTPS
160ms
TLSA
319ms
SOA
65ms
MTA-STS
130ms
DNSSEC
231ms
SRV
242ms
Total
3438ms

🕐 Scan History#

Scanned AtDurationRecordsDNSSEC
2026-10-23 20:41:09 2363ms 2 NS 2 A 5 MX 🔓 Insecure
2026-10-22 19:30:29 695ms 2 NS 2 A 5 MX 🔓 Insecure
2026-10-20 10:48:12 shown 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 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
dhd.dk [/] search Domains, Hosts & DNS — .dk zone