czacademy.dk
Last scanned: 2026-08-30 20:01:27  ·  454ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   35ms
NameserverIP addressesPTRASN / ISP
ns01.one.com 195.206.121.10
2001:67c:28cc::10		 ns01.one.com
ns01.one.com		 AS197495 One.com A/S
AS197495 One.com A/S
ns02.one.com 185.10.11.10
2001:67c:3c0::10		 ns02.one.com
ns02.one.com		 AS51468 One.com A/S
AS51468 One.com A/S
🌍 A Records1 records   26ms
IPTTLPTRASNISP / OrgCIDRCountryCity
199.36.158.100 3600s — AS54113 Fastly, Inc. 199.36.158.0/24 🇺🇸 United States —
📧 MX Records1 records   29ms
PriorityTTLMail ServerIP addressesPTRASN
0 300s .  Null MX — domain accepts no email (RFC 7505)
🔷 AAAA Records (IPv6)
✗ No AAAA records — IPv6 not configured
🔐 HTTPS Records
✗ No HTTPS RR — no SVCB/HTTPS service binding
📝 TXT Records1 records   124ms
TXT Record
hosting-site=czcacademy-cz
✉️ 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)
🔐 DNSSEC109ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA0ms
FieldValue
Serial2026083001
Primary NS (MNAME)ns01.one.com
Responsible (RNAME)hostmaster@one.com
Refresh14400s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)600s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
35ms
A
26ms
MX
29ms
AAAA
32ms
TXT
124ms
CAA
42ms
HTTPS
24ms
TLSA
62ms
SOA
0ms
MTA-STS
39ms
DNSSEC
109ms
SRV
48ms
Total
454ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-08-30 20:01:27 454ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-08-27 21:31:34 512ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-08-19 07:41:41 29009ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-08-07 19:26:14 8532ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-07-29 00:25:21 4639ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-07-25 21:13:46 4550ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-07-09 00:24:19 724ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-07-01 21:01:05 772ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-16 23:51:54 1024ms 2 NS 1 A 0 MX 🔓 Insecure View
2026-06-16 23:31:09 465ms 2 NS 1 A 0 MX 🔓 Insecure View
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