concat.dk
Last scanned: 2026-06-22 08:36:46  ·  882ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   40ms
NameserverIP addressesPTRASN / 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 Records2 records   39ms
PriorityTTLMail ServerIP addressesPTRASN
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 Records2 records   278ms
TXT Record
forward-email=markus@krabbelarsen.dk
v=spf1 a mx include:spf.forwardemail.net -all
✉️ SPF
PolicyRecord (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
🔗 TLSA / DANE2 records   87ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx1.forwardemail.net DANE-EE · SPKI · SHA-256 5E81DA1AF16DF20B13E667AD6D9C2B65…
SMTP _25._tcp.mx2.forwardemail.net DANE-EE · SPKI · SHA-256 5E81DA1AF16DF20B13E667AD6D9C2B65…
🔐 DNSSEC71ms
CheckResult
Validation Status🔒 Secure
AD Flag (resolver validates)✓ Set
DS Record✓ Found
DNSKEY Record✓ Found
Flagsresolution failed: ncache nxrrset
🏷️ SOA50ms
FieldValue
Serial0
Primary NS (MNAME)ns1.vultr.com
Responsible (RNAME)dnsadm@choopa.com
Refresh10800s
Retry3600s
Expire604800s
Minimum (neg-cache TTL)3600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
40ms
A
50ms
MX
39ms
AAAA
40ms
TXT
278ms
CAA
39ms
HTTPS
48ms
TLSA
87ms
SOA
50ms
MTA-STS
58ms
DNSSEC
71ms
SRV
111ms
Total
882ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-22 08:36:46 882ms 2 NS 0 A 2 MX 🔒 Secure View
2026-06-16 23:50:21 65535ms 2 NS 0 A 2 MX 🔒 Secure View
2026-06-16 22:10:52 397ms 2 NS 0 A 2 MX 🔒 Secure View
2026-06-16 22:06:22 1805ms 2 NS 0 A 2 MX 🔒 Secure View
2026-06-16 22:00:12 573ms 2 NS 0 A 2 MX 🔒 Secure View
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