indexo.dev

katro.cz

.cz crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP 200 824 ms crawled 2026-06-01

CZ · 188.75.128.90 · AS196735 JON.CZ s.r.o.

Reputation 95/100 weak security headers

DNS records live

NS
  • alfa.ns.active24.cz
  • beta.ns.active24.cz
  • gama.ns.active24.sk
MX
  • 50 mx.jon.cz
Verified for
  • Google

Email authentication strong

SPF
v=spf1 include:jon.cz ip4:188.75.128.0/18 a mx ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; rua=mailto:dmarc@katro.cz;
policy: quarantine
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-05-01 to 2026-07-30
Expires in 57 days

Full certificate history on crt.sh ↗

Linked from (1)