certosa.dk

📜 Historical scan 2026-08-28 00:37:29 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

certosa.dk is a .dk domain served by 3 nameservers (ns1.e-studio.dk, ns2.e-studio.dk, ns3.e-studio.dk). It was registered on 6 April 2023 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 195.242.131.32 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mx1.spamfri.dk, mx2.spamfri.dk and 1 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#

3 records 80ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.e-studio.dk	195.242.131.5 2001:67c:564:fffc::11	ns1.e-studio.dk ns1.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
ns2.e-studio.dk	2a00:1b18:2:3::2 62.69.152.34	ns2.e-studio.dk ns2.e-studio.dk	AS47527 DLX A/S AS47527 DLX A/S
ns3.e-studio.dk	193.200.90.183 2001:67c:564:fffc::13	ns3.e-studio.dk ns3.e-studio.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS

🌍 A Records#

1 records 55ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
195.242.131.32	14400s	web4.e-studio.dk	AS62121	Christian Ebsen ApS	195.242.130.0/23	🇩🇰 Denmark	—

📧 MX Records#

3 records 71ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1.spamfri.dk	195.242.131.16 2001:67c:564:fffd::1001	mx1.spamfri.dk mx1.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
20	3600s	mx2.spamfri.dk	193.200.91.109 2001:67c:564:fffd::2001	mx2.spamfri.dk mx2.spamfri.dk	AS62121 Christian Ebsen ApS AS62121 Christian Ebsen ApS
30	3600s	mx3.spamfri.dk	2a00:1b18:2:3:fe::2 62.69.152.43 62.69.152.43	mx3.spamfri.dk 43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX A/S AS47527 DLX A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	195.242.131.32
🔶 Autoconfig	195.242.131.32

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 88ms

Service	Priority	Weight	Port	Target
_autodiscover._tcp	0	0	443	cpanelemaildiscovery.cpanel.net

📝 TXT Records#

1 records 172ms

TXT Record
v=spf1 +include:_spf.e-studio.dk -all

✉️ SPF#

Policy	Record (certosa.dk)
-all (hard fail)	v=spf1 +include:_spf.e-studio.dk -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 2026-10-10 06:37:24

www CNAME	certosa.dk (all on certosa.dk) → 195.242.131.32 (AS62121)
www vs bare domain	Same network certosa.dk: 195.242.131.32 (AS62121) www.certosa.dk: 195.242.131.32 (AS62121)
Wildcard	No
Denial of existence	NSEC3 · 7 iterations · 8-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ 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: 1/10 · policy: -all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.certosa.dk	GSgwAOuzQURmPyLSuEJAOTykGFJ3KMqmfQi7Ih4mLmw

🔗 TLSA / DANE#

3 records 71ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.spamfri.dk	DANE-EE · SPKI · SHA-256	884451547A03D0AC2F628D943839BAA6…
SMTP _25._tcp.mx2.spamfri.dk	DANE-EE · SPKI · SHA-256	6598C93F79B95376BB8099E9AC862167…
SMTP _25._tcp.mx3.spamfri.dk	DANE-EE · SPKI · SHA-256	BBFB0694919290E5BC9D6E2C6F47D846…

🔐 DNSSEC#

88ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026080901
Primary NS (MNAME)	ns1.e-studio.dk
Responsible (RNAME)	hostmaster@mailrelay.e-studio.dk
Refresh	3600s
Retry	1800s
Expire	1209600s
Minimum (neg-cache TTL)	86400s

📋 Registration#

WHOIS fetched 2026-10-07 20:14:15

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2023-04-06
Expires	2027-04-05 (170d)

📋 WHOIS#

⏱️ Lookup Timing#

80ms

55ms

71ms

AAAA

54ms

TXT

172ms

CAA

60ms

HTTPS

58ms

TLSA

71ms

SOA

0ms

MTA-STS

85ms

DNSSEC

88ms

SRV

88ms

Total

811ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-10 06:37:23	1516ms	3 NS 1 A 3 MX	🔒 Secure
2026-09-24 23:31:39	567ms	3 NS 1 A 3 MX	🔒 Secure
2026-08-28 00:37:29 shown	811ms	3 NS 1 A 3 MX	🔒 Secure
2026-08-10 07:54:42	6453ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-22 22:35:53	735ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-20 03:37:57	1108ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-16 20:10:29	629ms	3 NS 1 A 3 MX	🔒 Secure