c5dk.dk

📜 Historical scan 2026-07-26 06:41:49 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c5dk.dk is a .dk domain served by 2 nameservers (ns1.concrete5danmark.dk, ns2.concrete5danmark.dk). It was registered on 19 December 2014 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 138.201.255.81 is hosted by Hetzner Online GmbH (AS24940) in Germany. Mail is handled by c5dk.dk. The zone is of unknown DNSSEC status, has no 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 94ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.concrete5danmark.dk	88.99.120.238	ns1.dnshotel.dk	AS24940 Hetzner Online GmbH
ns2.concrete5danmark.dk	94.130.170.39	ns2.dnshotel.dk	AS24940 Hetzner Online GmbH

🌍 A Records#

1 records 65ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
138.201.255.81	360s	server.concrete5danmark.dk	AS24940	Hetzner Online GmbH	138.201.0.0/16	🇩🇪 Germany	Falkenstein

📧 MX Records#

1 records 57ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
0	360s	c5dk.dk	138.201.255.81 2a01:4f8:173:2652::1	server.concrete5danmark.dk server.concrete5danmark.dk	AS24940 Hetzner Online GmbH AS24940 Hetzner Online GmbH

🔷 AAAA Records (IPv6)#

1 records 83ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2a01:4f8:173:2652::1	14400s	server.concrete5danmark.dk	AS24940	Hetzner Online GmbH	2a01:4f8:0:0:0:0:0:0/31	🇩🇪 Germany	Falkenstein

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 362ms

TXT Record
v=spf1 ip4:138.201.255.81 include:spf.azehosting.net +a +mx +ip4:159.100.183.187 include:relays.webhost-mail.com include:relay.mailchannels.net ~all

✉️ SPF#

Policy	Record (c5dk.dk)
~all (soft fail)	v=spf1 ip4:138.201.255.81 include:spf.azehosting.net +a +mx +ip4:159.100.183.187 include:relays.webhost-mail.com include:relay.mailchannels.net ~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 2026-10-22 08:02:02

www CNAME	c5dk.dk (all on c5dk.dk) → 138.201.255.81 2a01:4f8:173:2652::1 (AS24940)
www vs bare domain	Same network c5dk.dk: 138.201.255.81 2a01:4f8:173:2652::1 (AS24940) www.c5dk.dk: 138.201.255.81 2a01:4f8:173:2652::1 (AS24940)
Wildcard	No

✍️ DKIM keys#

1 found

Selector	CNAME	Key
default	—	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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.c5dk.dk	mE_xCEAmBDPDUU5VEUJXrxObiF_mtPUs-OFEHHC2VwU

🔗 TLSA / DANE#

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

🔐 DNSSEC#

156ms

Check	Result
Validation Status	❓ Unknown
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	broken trust chain resolving 'c5dk.dk/A/IN': 127.0.0.1#53

🏷️ SOA#

0ms

Field	Value
Serial	2026061303
Primary NS (MNAME)	ns1.concrete5danmark.dk
Responsible (RNAME)	server-admin@azehosting.net
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-16 17:40:28

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2014-12-19
Expires	2026-12-31 (67d)

🔗 Same registrant#

13 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
concrete-cms.dk	Punktum dk A/S (direct)
concrete5.dk	Punktum dk A/S (direct)
concrete5danmark.dk	Punktum dk A/S (direct)
concretecms.dk	Punktum dk A/S (direct)
dcay.dk	Punktum dk A/S (direct)
jardexportal.dk	Punktum dk A/S (direct)
jensen-maar.dk	Punktum dk A/S (direct)
kaikleveuden.dk	Punktum dk A/S (direct)
maargrafisk.dk	Punktum dk A/S (direct)
mgav.dk	Punktum dk A/S (direct)
perblumensaat.dk	Punktum dk A/S (direct)
randerspsykolog.dk	Punktum dk A/S (direct)
timur.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

94ms

65ms

57ms

AAAA

83ms

TXT

362ms

CAA

81ms

HTTPS

82ms

TLSA

195ms

SOA

0ms

MTA-STS

98ms

DNSSEC

156ms

SRV

157ms

Total

1531ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-22 08:02:02	1259ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-19 20:25:44	1390ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-18 18:34:58	574ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-16 17:22:57	3006ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-13 15:45:51	628ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-09 09:42:09	1010ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-06 04:37:25	1210ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-05 04:30:46	551ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-04 04:21:05	1065ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-03 04:46:02	1942ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-02 04:42:39	928ms	2 NS 1 A 1 MX	🔓 Insecure
2026-10-01 04:38:16	682ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-30 20:48:50	828ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-29 20:41:36	798ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-27 21:19:42	745ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-26 21:10:11	772ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-25 20:54:00	907ms	2 NS 1 A 1 MX	🔓 Insecure
2026-09-24 20:38:28	843ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-26 11:51:13	7349ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-24 22:10:42	713ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-21 20:40:10	4945ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-16 17:02:12	3322ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-15 05:38:30	8689ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-11 08:59:10	10308ms	2 NS 1 A 1 MX	🔓 Insecure
2026-08-09 10:45:46	4624ms	2 NS 1 A 1 MX	🔓 Insecure