jeza.dk
Last scanned: 2026-06-28 05:49:28  ·  5629ms total
⬇ Zone File 📜 Record History ⚡ Scan Now
🖥️ Nameservers2 records   281ms
NameserverIP addressesPTRASN / ISP
ns.web4u.cz 185.14.224.241
2001:1568:fd::241		 ns.web4u.cz
ns.web4u.cz		 AS39790 Web4U s.r.o.
AS39790 Web4U s.r.o.
ns2.web4u.cz 2a02:a40:100:28ff::12
85.207.53.12		 ns2.web4u.cz
ns2.web4u.cz		 AS25248 RADIOKOMUNIKACE a.s.
AS25248 RADIOKOMUNIKACE a.s.
🌍 A Records1 records   298ms
IPTTLPTRASNISP / OrgCIDRCountryCity
81.91.86.14 900s php7.web4u.cz AS39790 Web4U s.r.o. 81.91.80.0/20 🇨🇿 Czechia —
📧 MX Records1 records   247ms
PriorityTTLMail ServerIP addressesPTRASN
10 900s mx.web4u.cz 2001:1568::7012
81.91.87.12		 mx.web4u.cz
mx.web4u.cz		 AS39790 Web4U s.r.o.
AS39790 Web4U s.r.o.
📧 Autodiscover / Autoconfig
ServiceCNAME / IP
🔷 Autodiscover81.91.87.6
🔶 Autoconfig81.91.87.5
🔷 AAAA Records (IPv6)1 records   282ms
IPv6 AddressTTLPTRASNISP / OrgCIDRCountryCity
2001:1568::14 900s php7.web4u.cz AS39790 Web4U s.r.o. 2001:1568:0:0:0:0:0:0/32 🇨🇿 Czechia —
🔐 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 / DANE1 records   1623ms
Service / OwnerTypeCert association
SMTP _25._tcp.mx.web4u.cz DANE-EE · SPKI · SHA-256 FC3A9B6D2E5D7F67B776635683381542…
🔐 DNSSEC593ms
CheckResult
Validation Status🔓 Insecure
AD Flag (resolver validates)✗ Not set
DS Record✗ Not found
DNSKEY Record✗ Not found
Flagsunsigned answer
🏷️ SOA309ms
FieldValue
Serial2021082701
Primary NS (MNAME)ns.web4u.cz
Responsible (RNAME)admin@web4u.cz
Refresh10800s
Retry3600s
Expire1209600s
Minimum (neg-cache TTL)14400s
📋 Registration
✗ No registration data — collected automatically when SOA serial changes
📋 WHOIS
⏱️ Lookup Timing
NS
281ms
A
298ms
MX
247ms
AAAA
282ms
TXT
1204ms
CAA
262ms
HTTPS
296ms
TLSA
1623ms
SOA
309ms
MTA-STS
313ms
DNSSEC
593ms
SRV
590ms
Total
5629ms
🕐 Scan History
Scanned AtDurationRecordsDNSSEC
2026-06-28 05:49:28 5629ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-24 14:42:50 1389ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-20 01:56:58 890ms 2 NS 1 A 1 MX 🔓 Insecure View
2026-06-18 02:51:42 2287ms 2 NS 1 A 1 MX 🔓 Insecure View
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