jc81.dk

📜 Historical scan 2026-06-28 01:30:43 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

jc81.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 22 March 2009 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 193.200.90.178 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, 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 246ms

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 34.34-46.152.69.62.in-addr.arpa	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 212ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
193.200.90.178	600s	web6.e-studio.dk	AS62121	Christian Ebsen ApS	193.200.90.0/23	🇩🇰 Denmark	—

📧 MX Records#

3 records 243ms

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	193.200.90.178
🔶 Autoconfig	193.200.90.178

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

🔌 SRV Records#

1 records 231ms

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

📝 TXT Records#

1 records 422ms

TXT Record
v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk ip4:85.191.127.11 +a +mx ~all

✉️ SPF#

Policy	Record (jc81.dk)
~all (soft fail)	v=spf1 ip4:193.200.90.178 include:_spf.e-studio.dk ip4:85.191.127.11 +a +mx ~all

📨 DMARC#

Policy	Record (_dmarc.jc81.dk)
p=none (monitor only)	v=DMARC1; p=none;

📬 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 2026-10-22 15:21:27

www CNAME	jc81.dk (all on jc81.dk) → 193.200.90.178 (AS62121)
www vs bare domain	Same network jc81.dk: 193.200.90.178 (AS62121) www.jc81.dk: 193.200.90.178 (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: 3/10 · policy: ~all

No problems found

🔏 ACME Challenge#

Type	Name	Value
TXT	_acme-challenge.jc81.dk	fXaQ-NCnx2sO5yOWPEMQ7L-0hm1SK-GdD2MRoz5hhJY

🔗 TLSA / DANE#

3 records 789ms

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#

336ms

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

🏷️ SOA#

227ms

Field	Value
Serial	2026052301
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 2026-10-06 21:55:33

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2009-03-22
Expires	2027-03-31 (159d)

📋 WHOIS#

⏱️ Lookup Timing#

246ms

212ms

243ms

AAAA

246ms

TXT

422ms

CAA

368ms

HTTPS

231ms

TLSA

789ms

SOA

227ms

MTA-STS

260ms

DNSSEC

336ms

SRV

231ms

Total

2733ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-22 15:21:27	527ms	3 NS 1 A 3 MX	🔒 Secure
2026-09-24 18:21:56	607ms	3 NS 1 A 3 MX	🔒 Secure
2026-09-23 23:54:36	724ms	3 NS 1 A 3 MX	🔒 Secure
2026-07-23 17:33:54	972ms	3 NS 1 A 3 MX	🔒 Secure
2026-07-03 01:30:46	775ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-28 01:30:43 shown	2733ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-20 01:36:25	2815ms	3 NS 1 A 3 MX	🔒 Secure
2026-06-17 21:26:22	809ms	3 NS 1 A 3 MX	🔒 Secure