o31.dk

📜 Historical scan 2026-09-17 06:40:53 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

o31.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 January 2015 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.180 is hosted by Christian Ebsen ApS (AS62121) in Denmark. Mail is handled by mail.o31.dk. 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#

3 records 46ms

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 44ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.200.90.180	300s	web8.e-studio.dk	AS62121	Christian Ebsen ApS	193.200.90.0/23	🇩🇰 Denmark	—

📧 MX Records#

1 records 31ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mail.o31.dk	193.200.90.180	web8.e-studio.dk	AS62121 Christian Ebsen ApS

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	atollon.hostingnet.dk → 193.200.90.180
🔶 Autoconfig	atollon.hostingnet.dk → 193.200.90.180

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 138ms

TXT Record
v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all

✉️ SPF#

Policy	Record (o31.dk)
-all (hard fail)	v=spf1 +a +mx +ip4:193.200.90.180 include:_spf.e-studio.dk +include:_spf.hostingnet.dk -all

📨 DMARC#

Policy	Record (_dmarc.o31.dk)
p=none (monitor only)	v=DMARC1;p=none; sp=none; adkim=s; aspf=s

📬 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 23:16:26

www CNAME	o31.dk (all on o31.dk) → 193.200.90.180 (AS62121)
www vs bare domain	Same network o31.dk: 193.200.90.180 (AS62121) www.o31.dk: 193.200.90.180 (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: 4/10 · policy: -all

error include:_spf.hostingnet.dk has no SPF record: receivers that reach it return permerror (RFC 7208 §5.2)

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.o31.dk	0KIcesZEgDFqalyGX8M_gDBqieIPYBByi_UayVD-ZA0

🔗 TLSA / DANE#

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

🔐 DNSSEC#

88ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2026072401
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 06:08:08

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2015-01-06
Expires	2027-01-31 (105d)

📋 WHOIS#

⏱️ Lookup Timing#

46ms

44ms

31ms

AAAA

34ms

TXT

138ms

CAA

48ms

HTTPS

37ms

TLSA

52ms

SOA

0ms

MTA-STS

56ms

DNSSEC

88ms

SRV

56ms

Total

454ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-09-26 20:29:45	568ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-23 22:48:33	553ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-17 06:40:53 shown	454ms	3 NS 1 A 1 MX	🔓 Insecure
2026-09-04 13:34:12	566ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-26 07:46:03	703ms	3 NS 1 A 1 MX	🔓 Insecure
2026-08-12 16:21:54	5360ms	3 NS 1 A 1 MX	🔓 Insecure
2026-07-24 05:05:54	682ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-20 02:10:37	1586ms	3 NS 1 A 1 MX	🔓 Insecure
2026-06-17 22:07:30	566ms	3 NS 1 A 1 MX	🔓 Insecure