cetro.dk

📜 Historical scan 2026-08-29 14:48:38 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

cetro.dk is a .dk domain served by 2 nameservers (houston.ns.cloudflare.com, liv.ns.cloudflare.com). It was registered on 26 March 2012 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 216.150.1.1 is hosted by Amazon.com, Inc. (AS16509) in United States. 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 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 68ms

Nameserver	IP addresses	PTR	ASN / ISP
houston.ns.cloudflare.com	108.162.195.52 162.159.44.52 172.64.35.52 2606:4700:58::a29f:2c34 2803:f800:50::6ca2:c334 2a06:98c1:50::ac40:2334	houston.ns.cloudflare.com houston.ns.cloudflare.com houston.ns.cloudflare.com houston.ns.cloudflare.com houston.ns.cloudflare.com houston.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
liv.ns.cloudflare.com	108.162.192.188 172.64.32.188 173.245.58.188 2606:4700:50::adf5:3abc 2803:f800:50::6ca2:c0bc 2a06:98c1:50::ac40:20bc	liv.ns.cloudflare.com liv.ns.cloudflare.com liv.ns.cloudflare.com liv.ns.cloudflare.com liv.ns.cloudflare.com liv.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

1 records 75ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
216.150.1.1	600s	—	AS16509	Amazon.com, Inc.	216.150.1.0/24	🇺🇸 United States	—

📧 MX Records#

5 records 72ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	142.251.127.27 2a00:1450:4001:c21::1b	lcfrai-in-f27.1e100.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::1b	rd-in-f26.1e100.net rd-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC
5	300s	alt2.aspmx.l.google.com	172.253.152.27 2a00:1450:4010:c22::1a	yulpptr-in-f27.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	192.178.211.27 2404:6800:4000:1025::1b	lcbomp-in-f27.1e100.net lcbomp-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::1a	lcdels-in-f27.1e100.net lcdels-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	104.21.49.43
🔶 Autoconfig	172.67.158.207

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 317ms

TXT Record
google-site-verification=blnCeW685_JbMrI7c6m5ObAZ9D-bJYwINYidzRPDOfQ
v=spf1 ip4:45.148.28.147 ip4:172.104.230.139 include:_spf.google.com ~all

✉️ SPF#

Policy	Record (cetro.dk)
~all (soft fail)	v=spf1 ip4:45.148.28.147 ip4:172.104.230.139 include:_spf.google.com ~all

📨 DMARC#

Policy	Record (_dmarc.cetro.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:58a17d9634f84282ab94745e2bde27f0@dmarc-reports.cloudflare.net,mailto:morten@cetro.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 2026-10-09 19:25:18

www CNAME	e93b79b009335301.vercel-dns-017.com (all on vercel-dns-017.com) → 216.150.1.65 216.150.16.65 (AS16509)
www vs bare domain	Same network cetro.dk: 216.150.1.1 (AS16509) www.cetro.dk: 216.150.1.65 216.150.16.65 (AS16509)
Wildcard	Yes: any name under the zone resolves

✍️ DKIM keys#

1 found

Selector	CNAME	Key
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.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 1/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.cetro.dk	7EILM3lRAQGSlGgoau9_d0WDopZEIC9jx31WTWyXL8Q
TXT	_acme-challenge.cetro.dk	VJMiXtLDHcQIRcmjL_LKiw480syJUGv9a3PAxzwP5A0

🔗 TLSA / DANE#

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

🔐 DNSSEC#

237ms

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	2413441450
Primary NS (MNAME)	houston.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-07 11:37:27

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2012-03-26
Expires	2027-03-31 (163d)

📋 WHOIS#

⏱️ Lookup Timing#

68ms

75ms

72ms

AAAA

111ms

TXT

317ms

CAA

130ms

HTTPS

109ms

TLSA

156ms

SOA

0ms

MTA-STS

135ms

DNSSEC

237ms

SRV

153ms

Total

1536ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-07 11:20:38	1464ms	2 NS 1 A 5 MX	🔓 Insecure
2026-10-03 07:34:08	546ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-24 06:46:09	877ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-24 04:44:36	847ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-18 04:09:22	919ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-12 23:06:44	872ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-11 12:05:41	1590ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-04 09:34:52	2219ms	2 NS 1 A 5 MX	🔓 Insecure
2026-09-01 03:36:09	1397ms	2 NS 1 A 5 MX	🔓 Insecure
2026-08-29 14:48:38 shown	1536ms	2 NS 1 A 5 MX	🔓 Insecure
2026-07-08 13:52:15	3389ms	2 NS 1 A 5 MX	🔓 Insecure
2026-06-25 11:28:49	3385ms	2 NS 1 A 5 MX	🔓 Insecure
2026-06-24 00:41:14	999ms	2 NS 1 A 5 MX	🔓 Insecure
2026-06-21 09:14:30	1191ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-19 15:36:40	772ms	2 NS 1 A 5 MX	🔓 Insecure
2026-06-19 10:16:16	5577ms	2 NS 1 A 5 MX	🔓 Insecure
2026-06-16 20:10:36	561ms	2 NS 1 A 5 MX	🔓 Insecure