csk-el.dk

📜 Historical scan 2026-06-21 15:27:23 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

csk-el.dk is a .dk domain served by 2 nameservers (ns1.curanet.dk, ns2.curanet.dk). It was already in the .dk zone when our tracking began on 16 June 2026. Its website address 185.21.42.25 is hosted by team.blue Denmark A/S (AS48854) in Denmark. Mail is handled by mx1.onlinemail.io, mx2.onlinemail.io. 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#

2 records 203ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.curanet.dk	185.25.141.12 2a02:2339:4006:108::123	ns1.curanet.dk ns1.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
ns2.curanet.dk	2a02:2339:1:10f::123:123 91.197.248.75	ns2.curanet.dk ns2.curanet.dk	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S

🌍 A Records#

1 records 134ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
185.21.42.25	3600s	prolinux101.curanet.dk	AS48854	team.blue Denmark A/S	185.21.40.0/22	🇩🇰 Denmark	—

📧 MX Records#

2 records 209ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1.onlinemail.io	185.21.42.12	mx1.onlinemail.io	AS48854 team.blue Denmark A/S
20	3600s	mx2.onlinemail.io	46.36.208.16	mx2.onlinemail.io	AS48854 team.blue Denmark A/S

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscover-mf.onlinemail.io → 185.21.40.62
🔶 Autoconfig	autoconfig-mf.onlinemail.io → 185.21.40.62

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

1 records 756ms

TXT Record
v=spf1 a include:spf.curanet.dk include:sendgrid.net ~all

✉️ SPF#

Policy	Record (csk-el.dk)
~all (soft fail)	v=spf1 a include:spf.curanet.dk include:sendgrid.net ~all

📨 DMARC#

Policy	Record (_dmarc.csk-el.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 2026-10-09 04:24:30

www	185.21.42.25 (AS48854) (address records, no CNAME)
www vs bare domain	Same network csk-el.dk: 185.21.42.25 (AS48854) www.csk-el.dk: 185.21.42.25 (AS48854)
Wildcard	Yes: any name under the zone resolves
Denial of existence	NSEC3 · 1 iteration · 1-byte salt RFC 9276 recommends 0 iterations and no salt
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u42085828.wl079.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u42085828.wl079.sendgrid.net	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: 6/10 · policy: ~all

No problems found

🔗 TLSA / DANE#

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

🔐 DNSSEC#

684ms

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

🏷️ SOA#

144ms

Field	Value
Serial	2024041901
Primary NS (MNAME)	ns1.curanet.dk
Responsible (RNAME)	hostmaster@curanet.dk
Refresh	14400s
Retry	3600s
Expire	1209600s
Minimum (neg-cache TTL)	300s

📋 Registration#

✗ No registration data yet — queued for a WHOIS lookup

📋 WHOIS#

⏱️ Lookup Timing#

203ms

134ms

209ms

AAAA

133ms

TXT

756ms

CAA

132ms

HTTPS

135ms

TLSA

1649ms

SOA

144ms

MTA-STS

228ms

DNSSEC

684ms

SRV

249ms

Total

5598ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-09 04:24:29	395ms	2 NS 1 A 2 MX	🔒 Secure
2026-09-27 00:17:57	501ms	2 NS 1 A 2 MX	🔒 Secure
2026-08-27 14:08:25	741ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-21 15:27:23 shown	5598ms	2 NS 1 A 2 MX	🔒 Secure
2026-06-21 11:35:01	1206ms	0 NS 0 A 0 MX	❓ Unknown
2026-06-16 23:05:15	553ms	2 NS 1 A 2 MX	🔒 Secure