esug.dk

📜 Historical scan 2026-09-30 08:36:47 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

esug.dk is a .dk domain served by 2 nameservers (clint.ns.cloudflare.com, lilyana.ns.cloudflare.com). It was registered on 4 October 2010 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.50.209 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by mx.spamfilter.io, mxa.eu.mailgun.org and 1 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. 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 41ms

Nameserver	IP addresses	PTR	ASN / ISP
clint.ns.cloudflare.com	108.162.193.90 172.64.33.90 173.245.59.90 2606:4700:58::adf5:3b5a 2803:f800:50::6ca2:c15a 2a06:98c1:50::ac40:215a	clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com clint.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
lilyana.ns.cloudflare.com	108.162.194.244 162.159.38.244 172.64.34.244 2606:4700:50::a29f:26f4 2803:f800:50::6ca2:c2f4 2a06:98c1:50::ac40:22f4	lilyana.ns.cloudflare.com lilyana.ns.cloudflare.com lilyana.ns.cloudflare.com lilyana.ns.cloudflare.com lilyana.ns.cloudflare.com lilyana.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 45ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.50.209	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.167.29	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

3 records 41ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	mx.spamfilter.io	46.36.212.34 46.36.212.36 46.36.212.37 46.36.212.38 89.188.78.64 89.188.78.65 89.188.78.66 94.231.106.12	node4.spamfilter.io node8.spamfilter.io node6.spamfilter.io node7.spamfilter.io node3.spamfilter.io node9.spamfilter.io node10.spamfilter.io node2.spamfilter.io	AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S AS48854 team.blue Denmark A/S
20	300s	mxa.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC
30	300s	mxb.eu.mailgun.org	34.111.130.244	244.130.111.34.bc.googleusercontent.com	AS396982 Google LLC

📧 Autodiscover / Autoconfig#

Service	CNAME / IP
🔷 Autodiscover	autodiscoverredirect.webexchange.nu → 212.237.249.80

🔷 AAAA Records (IPv6)#

2 records 42ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3034::6815:32d1	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3035::ac43:a71d	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 48ms

Priority	Target	SvcParams
1 service	.	alpn="h3,h2" ipv4hint=104.21.50.209,172.67.167.29 ech=AEX+DQBB8gAgACBA0yawhpP/qGHPHxmg/hTutpXx7UjOWW13PS65rmNrDwAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3034::6815:32d1,2606:4700:3035::ac43:a71d

📝 TXT Records#

1 records 183ms

TXT Record
v=spf1 include:mailgun.org ip4:185.25.141.12 ip4:91.197.248.75 ip4:94.231.105.120 include:spf.curanet.dk ~all

✉️ SPF#

Policy	Record (esug.dk)
~all (soft fail)	v=spf1 include:mailgun.org ip4:185.25.141.12 ip4:91.197.248.75 ip4:94.231.105.120 include:spf.curanet.dk ~all

📨 DMARC#

Policy	Record (_dmarc.esug.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 2026-10-15 07:29:39

www	104.21.50.209 172.67.167.29 2606:4700:3034::6815:32d1 2606:4700:3035::ac43:a71d (AS13335) (address records, no CNAME)
www vs bare domain	Same network esug.dk: 104.21.50.209 172.67.167.29 2606:4700:3034::6815:32d1 2606:4700:3035::ac43:a71d (AS13335) www.esug.dk: 104.21.50.209 172.67.167.29 2606:4700:3034::6815:32d1 2606:4700:3035::ac43:a71d (AS13335)
Wildcard	No

✍️ DKIM keys#

2 found

Selector	CNAME	Key
s1	s1.domainkey.u29276135.wl136.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u29276135.wl136.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: 8/10 · policy: ~all

warn 8 of the 10 allowed DNS lookups used: one more include can break SPF

🔗 TLSA / DANE#

1 records 131ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx.spamfilter.io	DANE-EE · SPKI · SHA-256	9A25F05F2E322DABDCC9B7A06AB47A2D…

🔐 DNSSEC#

63ms

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

🏷️ SOA#

0ms

Field	Value
Serial	2415642030
Primary NS (MNAME)	clint.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-13 13:50:50

Field	Value
Registrar	DANDOMAIN A/S
Registered	2010-10-04
Expires	2026-10-31 (14d)

🔗 Same registrant#

0 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

41ms

45ms

41ms

AAAA

42ms

TXT

183ms

CAA

41ms

HTTPS

48ms

TLSA

131ms

SOA

0ms

MTA-STS

48ms

DNSSEC

63ms

SRV

57ms

Total

729ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-01 08:42:56	959ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-30 08:36:47 shown	729ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-24 01:03:57	820ms	2 NS 2 A 3 MX	🔓 Insecure
2026-09-05 03:18:01	1242ms	2 NS 2 A 3 MX	🔓 Insecure
2026-07-03 20:35:18	9865ms	2 NS 2 A 3 MX	🔓 Insecure
2026-06-29 13:38:53	697ms	2 NS 1 A 3 MX	🔒 Secure
2026-06-22 03:15:50	582ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-20 15:12:40	709ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-19 00:24:49	2126ms	2 NS 1 A 3 MX	🔓 Insecure
2026-06-17 08:27:02	1453ms	2 NS 1 A 3 MX	🔒 Secure