21run.dk
Last scanned: 2026-07-24 06:44:51  ·  22193ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   2045ms
NameserverIP addressesPTRASN / ISP
ns1.whirlwind.nl 2a02:2870:c002:2291:46:17:15:71
46.17.15.71		 ns1.whirlwind.nl
ns1.whirlwind.nl		 AS60781 LeaseWeb Netherlands B.V.
AS60781 LeaseWeb Netherlands B.V.
ns2.whirlwind.nl 46.17.9.71 ns2.whirlwind.nl AS39591 Previder B.V.
🌍 A Records1 records   52ms
IPTTLPTRASNISP / OrgCIDRCountryCity
46.17.9.85 14400s — AS39591 Previder B.V. 46.17.8.0/22 🇳🇱 The Netherlands Bergen op Zoom
📧 MX Records3 records   2044ms
PriorityTTLMail ServerIP addressesPTRASN
10 14400s mail.21run.dk 46.17.9.85 s2.whirlwind.nl AS39591 Previder B.V.
20 14400s fallback1.whirlwind.nl 2a02:2870:c002:2291:46:17:15:72
46.17.15.72		 —
—		 AS60781 LeaseWeb Netherlands B.V.
AS60781 LeaseWeb Netherlands B.V.
30 14400s fallback2.whirlwind.nl 46.17.9.72 fallback2.whirlwind.nl AS39591 Previder B.V.
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records
📝
No TXT records found
✉️ SPF
✗ No SPF record — mail spoofing not restricted
📨 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 / DANE
✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)
🔐 DNSSEC4049ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA53ms
FieldValue
Serial2020111001
Primary NS (MNAME)ns1.whirlwind.nl
Responsible (RNAME)kristof@all4running.be
Refresh10800s
Retry3600s
Expire604800s
Minimum (neg-cache TTL)10800s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
2045ms
A
52ms
MX
2044ms
AAAA
54ms
TXT
247ms
CAA
4030ms
HTTPS
57ms
TLSA
4034ms
SOA
53ms
MTA-STS
4038ms
DNSSEC
4049ms
SRV
4033ms
Total
22193ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-07-24 06:44:51 22193ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-07-02 01:23:37 1480ms 2 NS 1 A 3 MX 🔓 Insecure View
2026-06-16 12:43:45 914ms 2 NS 1 A 3 MX 🔓 Insecure View
dhd.dk [/] search Domains, Hosts & DNS — .dk zone