teubner.dk

📜 Historical scan 2026-06-18 02:02:54 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

teubner.dk is a .dk domain served by 2 nameservers (bayan.ns.cloudflare.com, sharon.ns.cloudflare.com). It was registered on 4 February 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx.zoho.com, mx2.zoho.com and 1 more. The zone is DNSSEC-signed but currently fails validation, has no DMARC policy and has no IPv6 address. 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 28ms

Nameserver	IP addresses	PTR	ASN / ISP
bayan.ns.cloudflare.com	108.162.193.72 172.64.33.72 173.245.59.72 2606:4700:58::adf5:3b48 2803:f800:50::6ca2:c148 2a06:98c1:50::ac40:2148	bayan.ns.cloudflare.com bayan.ns.cloudflare.com bayan.ns.cloudflare.com bayan.ns.cloudflare.com bayan.ns.cloudflare.com bayan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
sharon.ns.cloudflare.com	108.162.192.221 172.64.32.221 173.245.58.221 2606:4700:50::adf5:3add 2803:f800:50::6ca2:c0dd 2a06:98c1:50::ac40:20dd	sharon.ns.cloudflare.com sharon.ns.cloudflare.com sharon.ns.cloudflare.com sharon.ns.cloudflare.com sharon.ns.cloudflare.com sharon.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

🌍

No A records found

📧 MX Records#

3 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx.zoho.com	204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44	mx7.zoho.com mx6.zoho.com mx3.zohomail.com mx2.zohomail.com mx.zohomail.com mx.zoho.com mx3.zoho.com mx2.zoho.com mx8.zoho.com	AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO
20	—	mx2.zoho.com	204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44	mx2.zohomail.com mx2.zoho.com mx3.zoho.com mx.zoho.com mx.zohomail.com mx3.zohomail.com mx6.zoho.com mx7.zoho.com mx8.zoho.com	AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO
50	—	mx3.zoho.com	204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44 204.141.43.44	mx8.zoho.com mx7.zoho.com mx6.zoho.com mx3.zohomail.com mx2.zohomail.com mx.zohomail.com mx.zoho.com mx3.zoho.com mx2.zoho.com	AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO AS2639 ZOHO

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 136ms

TXT Record
v=spf1 mx include:zoho.com ~all
zoho-verification=zb14257210.zmverify.zoho.com

✉️ SPF#

Policy	Record (teubner.dk)
~all (soft fail)	v=spf1 mx include:zoho.com ~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

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-08 12:56:18

www	NXDOMAIN
www vs bare domain	Neither resolves teubner.dk: no address www.teubner.dk: no address
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
dkim	—	RSA · ~1024 bit below 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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 6/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

104ms

Check	Result
Validation Status	⚠️ Bogus
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'teubner.dk/A/IN': 127.0.0.1#53

🏷️ SOA#

38ms

Field	Value
Serial	2406572430
Primary NS (MNAME)	bayan.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-05 12:35:04

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2010-02-04
Expires	2027-02-28 (125d)

📋 WHOIS#

⏱️ Lookup Timing#

28ms

42ms

40ms

AAAA

39ms

TXT

136ms

CAA

39ms

HTTPS

40ms

TLSA

313ms

SOA

38ms

MTA-STS

33ms

DNSSEC

104ms

SRV

76ms

Total

1128ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-05 12:17:48	1608ms	2 NS 0 A 3 MX	🔓 Insecure
2026-10-04 12:00:19	745ms	2 NS 0 A 3 MX	🔓 Insecure
2026-09-27 22:15:53	600ms	2 NS 0 A 3 MX	🔓 Insecure
2026-08-30 04:44:41	1149ms	2 NS 0 A 3 MX	🔓 Insecure
2026-08-25 23:46:23	9625ms	2 NS 0 A 3 MX	🔓 Insecure
2026-08-07 19:30:10	1245ms	2 NS 0 A 3 MX	🔓 Insecure
2026-07-03 06:36:39	2289ms	2 NS 0 A 3 MX	🔓 Insecure
2026-06-26 04:40:54	2478ms	2 NS 0 A 3 MX	🔓 Insecure
2026-06-18 02:02:54 shown	1128ms	2 NS 0 A 3 MX	⚠️ Bogus