cetro.dk DNS records

🖥️ Nameservers2 records 56ms

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 Records1 records 56ms

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 Records5 records 52ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
1	300s	aspmx.l.google.com	2a00:1450:4010:c01::1b 2a00:1450:4010:c01::1b 64.233.161.27	lh-in-x1b.1e100.net lh-in-f27.1e100.net lh-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
5	300s	alt1.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
5	300s	alt2.aspmx.l.google.com	173.194.41.27 173.194.41.27 2404:6800:4001:c01::1a	yukulwh-in-f27.1e100.net mad01s14-in-f27.1e100.net yukulwh-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
10	300s	alt3.aspmx.l.google.com	172.253.158.26 2404:6800:4003:c26::1a	so-in-f26.1e100.net so-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
10	300s	alt4.aspmx.l.google.com	108.177.125.27 2404:6800:4008:c01::1b	tp-in-f27.1e100.net tp-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

📧 Autodiscover / Autoconfig

Service	CNAME / IP
🔷 Autodiscover	172.67.158.207
🔶 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 Records2 records 224ms

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

🔏 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)

🔐 DNSSEC111ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA0ms

Field	Value
Serial	2413657990
Primary NS (MNAME)	houston.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration

✗ No registration data — collected automatically when SOA serial changes

📋 WHOIS

⏱️ Lookup Timing

NS

56ms

A

56ms

MX

52ms

AAAA

53ms

TXT

224ms

CAA

50ms

HTTPS

59ms

TLSA

115ms

SOA

0ms

MTA-STS

67ms

DNSSEC

111ms

SRV

83ms

Total

1397ms

🕐 Scan History

Scanned At	Duration	Records	DNSSEC
2026-09-01 03:36:09	1397ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-08-29 14:48:38	1536ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-07-08 13:52:15	3389ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-06-25 11:28:49	3385ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-06-24 00:41:14	999ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-06-21 09:14:30	1191ms	0 NS 0 A 0 MX	❓ Unknown	View
2026-06-19 15:36:40	772ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-06-19 10:16:16	5577ms	2 NS 1 A 5 MX	🔓 Insecure	View
2026-06-16 20:10:36	561ms	2 NS 1 A 5 MX	🔓 Insecure	View