concat.dk

📜 Historical scan 2026-09-30 19:00:21 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

concat.dk is a .dk domain served by 2 nameservers (ns1.vultr.com, ns2.vultr.com). It was registered on 15 September 2018 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Mail is handled by mx1.forwardemail.net, mx2.forwardemail.net. 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#

2 records 48ms

Nameserver	IP addresses	PTR	ASN / ISP
ns1.vultr.com	173.199.96.96 2001:19f0:ccc::1 2001:19f0:ccd::1	ns1.vultrusercontent.com — ns1.vultr.com	AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC
ns2.vultr.com	173.199.96.97 2001:19f0:ccc::2 2001:19f0:ccd::2	ns2.vultrusercontent.com — ns2.vultr.com	AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC AS20473 The Constant Company, LLC

🌍 A Records#

🌍

No A records found

📧 MX Records#

2 records 44ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	3600s	mx1.forwardemail.net	121.127.44.56 138.197.213.185 2604:a880:2:d0::306:1 2a02:6ea0:d71e::2	mx1.forwardemail.net mx1.forwardemail.net mx1.forwardemail.net mx1.forwardemail.net	AS60068 Datacamp Limited AS14061 DigitalOcean, LLC AS14061 DigitalOcean, LLC AS60068 Datacamp Limited
10	3600s	mx2.forwardemail.net	104.248.224.170 121.127.44.59 2604:a880:400:d1::cd:9001 2a02:6ea0:d71e::1	mx2.forwardemail.net mx2.forwardemail.net mx2.forwardemail.net mx2.forwardemail.net	AS14061 DigitalOcean, LLC AS60068 Datacamp Limited AS14061 DigitalOcean, LLC AS60068 Datacamp Limited

🔷 AAAA Records (IPv6)#

✗ No AAAA records — IPv6 not configured

🔐 HTTPS Records#

✗ No HTTPS RR — no SVCB/HTTPS service binding

📝 TXT Records#

2 records 207ms

TXT Record
forward-email=markus@krabbelarsen.dk
v=spf1 a mx include:spf.forwardemail.net -all

✉️ SPF#

Policy	Record (concat.dk)
-all (hard fail)	v=spf1 a mx include:spf.forwardemail.net -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 2026-10-07 20:11:10

www	NXDOMAIN
www vs bare domain	Neither resolves concat.dk: no address www.concat.dk: no address
Wildcard	No
Denial of existence	NSEC zone can be walked (all names enumerable)
CDS / CDNSKEY	None 0 CDS, 0 CDNSKEY

🔎 SPF check#

zone-wide SPF report

DNS lookups: 7/10 · policy: -all

No problems found

🔗 TLSA / DANE#

4 records 50ms

Service / Owner	Type	Cert association
SMTP _25._tcp.mx1.forwardemail.net	DANE-EE · SPKI · SHA-256	5E81DA1AF16DF20B13E667AD6D9C2B65…
SMTP _25._tcp.mx1.forwardemail.net	DANE-EE · SPKI · SHA-256	321F694EAD3A2E733D857FD7E79D811F…
SMTP _25._tcp.mx2.forwardemail.net	DANE-EE · SPKI · SHA-256	321F694EAD3A2E733D857FD7E79D811F…
SMTP _25._tcp.mx2.forwardemail.net	DANE-EE · SPKI · SHA-256	5E81DA1AF16DF20B13E667AD6D9C2B65…

🔐 DNSSEC#

85ms

Check	Result
Validation Status	🔒 Secure
AD Flag (resolver validates)	✓ Set
DS Record	✓ Found
DNSKEY Record	✓ Found
Flags	resolution failed: ncache nxrrset

🏷️ SOA#

100ms

Field	Value
Serial	0
Primary NS (MNAME)	ns1.vultr.com
Responsible (RNAME)	dnsadm@choopa.com
Refresh	10800s
Retry	3600s
Expire	604800s
Minimum (neg-cache TTL)	3600s

📋 Registration#

WHOIS fetched 2026-10-14 02:28:00

Field	Value
Registrar	Punktum dk A/S (direct)
Registered	2018-09-15
Expires	2026-11-30 (44d)

🔗 Same registrant#

2 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).

Domain	Registrar
korollar.dk	Punktum dk A/S (direct)
panopti.dk	Punktum dk A/S (direct)

📋 WHOIS#

⏱️ Lookup Timing#

48ms

46ms

44ms

AAAA

53ms

TXT

207ms

CAA

61ms

HTTPS

62ms

TLSA

50ms

SOA

100ms

MTA-STS

65ms

DNSSEC

85ms

SRV

79ms

Total

767ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-02 19:25:46	1756ms	2 NS 0 A 2 MX	🔒 Secure
2026-09-30 19:00:21 shown	767ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-22 08:36:46	882ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 23:50:21	65535ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 22:10:52	397ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 22:06:22	1805ms	2 NS 0 A 2 MX	🔒 Secure
2026-06-16 22:00:12	573ms	2 NS 0 A 2 MX	🔒 Secure