indexo.dev

gcsystem.cz

.cz crawl

First seen 2026-05-31 · Last seen 2026-06-02 · pending HTTP 400 crawled 2026-06-02 3 attempts

CZ · 217.198.116.171 · AS34222 ZONER a.s.

Reputation 75/100 wrong cert

http 400

Registration

Registrar
REG-ACTIVE24
Created
1996-10-17
Expires
2026-10-28 147 days left
Updated
2025-01-20
Name servers
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu

DNS records live

NS
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu
MX
  • 10 mail1.gcsystem.cz
  • 50 mail.gcsystem.cz
TXT
  • atlassian-sending-domain-verification=2f50bc52-5fc9-409f-85ac-063547430796
Verified for
  • Atlassian

Email authentication strong

SPF
v=spf1 ip4:213.29.96.228 ip4:213.29.96.229 ip4:77.93.218.38 include:spf.protection.outlook.com include:_spf.google.com include:_spf.salesforce.com ~all
softfail (~all)
DMARC
v=DMARC1; p=reject; pct=100; aspf=s; adkim=s; fo=1; ruf=mailto:dmarc@gcsystem.cz;
policy: reject (enforced)
DKIM
  • default: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC5ajOxQ64k00jeTrT1/bvBW2MesBfyc9as/3QfKiwjNXnJfQ98jTlfsFJPh4abHuG+Rw6cF0oYqNr+ctK4f/…
selectors probed

Certificate (current) wrong cert

R12
from 2026-04-27 to 2026-07-26
Expires in 53 days

Full certificate history on crt.sh ↗

Linked from (4)