indexo.dev

gc-system.cz

.cz dns crawl

First seen 2026-05-20 · Last seen 2026-05-31 · ok HTTP 200 1459 ms crawled 2026-05-27

CZ · 88.86.102.7 · AS39392 SH.cz s.r.o.

Reputation 64/100 wrong cert weak security headers dmarc monitor-only

Registration

Registrar
REG-INTERNET-CZ
Created
2000-10-11
Expires
2026-10-11 132 days left
Updated
2015-10-01
Name servers
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net

DNS records live

NS
  • ns.forpsi.cz
  • ns.forpsi.it
  • ns.forpsi.net
MX
  • 0 gcsystem-cz0e.mail.protection.outlook.com
  • 5 mail.fortknox.cz
Verified for
  • Microsoft 365

Email authentication partial

SPF
v=spf1 ip4:93.91.151.224 include:spfa.gc-system.cz include:spf.protection.outlook.com -all
strict (-all)
DMARC
v=DMARC1; p=none; pct=100
policy: none (monitoring only)
DKIM
  • selector2: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDaojlIXpje2K+0ICtxqFxwXriImoW62HYXhqxnQJxuzH5IzF6GztghTqRKN6IQLHrLALTUpP46rgmv2WNlXv…
selectors probed

Certificate (current) wrong cert

R13
from 2026-04-06 to 2026-07-05
Expires in 34 days

Full certificate history on crt.sh ↗

Linked from (4)