certosa.dk

📜 Historical scan 2026-06-16 20:10:29 · ← 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 60ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.e-studio.dk	—	—	—
ns2.e-studio.dk	—	—	—
ns3.e-studio.dk	—	—	—

🌍 A Records#

1 records 59ms

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

📧 MX Records#

3 records 62ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	—	mx1.spamfri.dk	195.242.131.16	mx1.spamfri.dk	AS62121 Christian Ebsen ApS
20	—	mx2.spamfri.dk	193.200.91.109	mx2.spamfri.dk	AS62121 Christian Ebsen ApS
30	—	mx3.spamfri.dk	62.69.152.43 62.69.152.43	43.34-46.152.69.62.in-addr.arpa mx3.spamfri.dk	AS47527 DLX A/S AS47527 DLX A/S

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 126ms

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

🔗 TLSA / DANE#

3 records 79ms

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#

144ms

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

🏷️ SOA#

55ms

Field	Value
Serial	2026060901
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#

60ms

59ms

62ms

AAAA

58ms

TXT

126ms

CAA

61ms

HTTPS

60ms

TLSA

79ms

SOA

55ms

MTA-STS

78ms

DNSSEC

144ms

SRV

0ms

Total

629ms

🕐 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	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 shown	629ms	3 NS 1 A 3 MX	🔒 Secure