c3.dk

📜 Historical scan 2026-09-12 02:44:07 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

c3.dk is a .dk domain served by 2 nameservers (bonnie.ns.cloudflare.com, ignacio.ns.cloudflare.com). It was registered on 20 May 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.47.161 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, 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 52ms

Nameserver	IP addresses	PTR	ASN / ISP
bonnie.ns.cloudflare.com	108.162.192.76 172.64.32.76 173.245.58.76 2606:4700:50::adf5:3a4c 2803:f800:50::6ca2:c04c 2a06:98c1:50::ac40:204c	bonnie.ns.cloudflare.com bonnie.ns.cloudflare.com bonnie.ns.cloudflare.com bonnie.ns.cloudflare.com bonnie.ns.cloudflare.com bonnie.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
ignacio.ns.cloudflare.com	108.162.195.82 162.159.44.82 172.64.35.82 2606:4700:58::a29f:2c52 2803:f800:50::6ca2:c352 2a06:98c1:50::ac40:2352	ignacio.ns.cloudflare.com ignacio.ns.cloudflare.com ignacio.ns.cloudflare.com ignacio.ns.cloudflare.com ignacio.ns.cloudflare.com ignacio.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 43ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.47.161	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.149.17	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

5 records 54ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	3600s	aspmx.l.google.com	142.251.9.27 2a00:1450:4025:c01::1a	rc-in-f27.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt1.aspmx.l.google.com	192.178.211.26 2404:6800:4000:1025::1a	lcbomp-in-f26.1e100.net lcbomp-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	3600s	alt2.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
10	3600s	alt3.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	3600s	alt4.aspmx.l.google.com	172.253.158.27 2404:6800:4003:c26::1b	so-in-f27.1e100.net so-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

2 records 54ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::6815:2fa1	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3037::ac43:9511	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 56ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.47.161,172.67.149.17 ech=AEX+DQBBkgAgACB6siNvOTNHmFZXJSWFU55n4zO8NuB9kouNEdg+Dh6kKwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::6815:2fa1,2606:4700:3037::ac43:9511

📝 TXT Records#

1 records 188ms

TXT Record
v=spf1 include:_spf.google.com ~all

✉️ SPF#

Policy	Record (c3.dk)
~all (soft fail)	v=spf1 include:_spf.google.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 07:55:33

www	NXDOMAIN
www vs bare domain	www does not resolve c3.dk: 104.21.47.161 172.67.149.17 2606:4700:3032::6815:2fa1 2606:4700:3037::ac43:9511 (AS13335) www.c3.dk: no address (all like this)
Wildcard	No

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.c3.dk	GJ9OdIiexpMOrHcu0Z8_OMqTb2Fq8m_rnrYVM_sGDoc
TXT	_acme-challenge.c3.dk	YKOjteEXcAOVnSjW3DX5KyJHRrjTTHE9yhu6HYkhjyo

🔗 TLSA / DANE#

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

🔐 DNSSEC#

2063ms

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	2414633234
Primary NS (MNAME)	bonnie.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-12 07:50:45

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-05-20
Expires	2027-05-31 (226d)

🔗 Same registrant#

2 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
rebaser.dk	Punktum dk A/S (direct)
stopa.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

52ms

43ms

54ms

AAAA

54ms

TXT

188ms

CAA

47ms

HTTPS

56ms

TLSA

170ms

SOA

0ms

MTA-STS

73ms

DNSSEC

2063ms

SRV

65ms

Total

3297ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-14 20:38:07	3857ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-12 02:44:07 shown	3297ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-31 20:36:12	723ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-27 17:36:32	1008ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-17 00:31:06	1645ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-05 17:46:23	34173ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-03 12:08:34	1029ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-28 08:05:40	2546ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-16 18:47:06	535ms	2 NS 2 A 5 MX	🔓 Insecure
2026-06-16 18:40:31	749ms	2 NS 2 A 5 MX	🔓 Insecure