tchr.dk

📜 Historical scan 2026-09-28 12:53:32 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

tchr.dk is a .dk domain served by 2 nameservers (ns01.one.com, ns02.one.com). It was registered on 29 December 2004 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 136.243.21.9 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is DNSSEC-signed and validates, 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 37ms

Nameserver	IP addresses	PTR	ASN / ISP
ns01.one.com	195.206.121.10 2001:67c:28cc::10	ns01.one.com ns01.one.com	AS197495 One.com A/S AS197495 One.com A/S
ns02.one.com	185.10.11.10 2001:67c:3c0::10	ns02.one.com ns02.one.com	AS51468 One.com A/S AS51468 One.com A/S

🌍 A Records#

1 records 34ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
136.243.21.9	3600s	static.9.21.243.136.clients.your-server.de	AS24940	Hetzner Online GmbH	136.243.0.0/16	🇩🇪 Germany	Falkenstein

📧 MX Records#

5 records 40ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	43200s	aspmx.l.google.com	2a00:1450:4010:c07::1b 2a00:1450:4010:c07::1b 64.233.162.27	lf-in-x1b.1e100.net lf-in-f27.1e100.net li-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	43200s	alt1.aspmx.l.google.com	192.178.158.26 2404:6800:4013:813::1a	lcdels-in-f26.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	43200s	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	43200s	aspmx2.googlemail.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
10	43200s	aspmx3.googlemail.com	173.194.41.26 173.194.41.26 2404:6800:4001:c01::1b	mad01s14-in-f26.1e100.net yukulwh-in-f26.1e100.net yukulwh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	nginx.elysion.unicast.org
🔶 Autoconfig	nginx.elysion.unicast.org

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 152ms

TXT Record
google-site-verification=0xoPFtcYn8L_HDTiF1Sx26PxtUzl03W1z6Qe0eCwQ34
google-site-verification=iFPtizajeT4FDBB6qTjK28H8brZda7bJ9JpJfX68wGc

✉️ SPF#

✗ No SPF record — mail spoofing not restricted

📨 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 2026-10-04 13:19:37

www CNAME	nginx.elysion.unicast.org (all on unicast.org)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔏 ACME Challenge#

Type	Name	Value
CNAME	_acme-challenge.tchr.dk	nginx.elysion.unicast.org

🔗 TLSA / DANE#

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

🔐 DNSSEC#

107ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	fully validated

🏷️ SOA#

0ms

Field	Value
Serial	2026092801
Primary NS (MNAME)	ns01.one.com
Responsible (RNAME)	hostmaster@one.com
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	600s

📋 Registration#

WHOIS fetched 2026-10-04 14:08:53

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2004-12-29
Expires	2026-12-31 (73d)

📋 WHOIS#

⏱️ Lookup Timing#

37ms

34ms

40ms

AAAA

46ms

TXT

152ms

CAA

41ms

HTTPS

44ms

TLSA

67ms

SOA

0ms

MTA-STS

88ms

DNSSEC

107ms

SRV

89ms

Total

887ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-04 13:19:37	877ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-29 12:59:41	979ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-28 12:53:32 shown	887ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-27 12:46:51	1019ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-22 12:39:11	1179ms	2 NS 1 A 5 MX	🔒 Secure
2026-09-01 08:08:38	2938ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-26 22:54:43	849ms	2 NS 1 A 5 MX	🔒 Secure
2026-06-17 23:47:14	1009ms	2 NS 1 A 5 MX	🔒 Secure