indexo.dev

coolnet.cz

.cz dns crawl

First seen 2026-05-31 · Last seen 2026-06-01 · ok HTTP/1.1 200 253 ms crawled 2026-06-01

CZ · 217.112.167.50 · AS20723 AVONET, s.r.o.

Reputation 92/100 weak subdomain policy

Classifying

HTML metadata

Title
o COOLNET o

Technology

Server
nginx

Third-party hosts loaded (1)

  • avonet.cz×1

Contact

Email

Registration

Registrar
REG-WEBGLOBE
Created
2001-04-03
Expires
2027-04-02 303 days left
Updated
2007-11-21
Name servers
  • ns2.coolnet.cz
  • ns.coolnet.cz

DNS records live

NS
  • ns.coolnet.cz
  • ns2.coolnet.cz
MX
  • 10 mail2.coolnet.cz
  • 5 mail.coolnet.cz
Verified for
  • Google

Email authentication strong

SPF
v=spf1 mx ip4:217.112.167.50 ?all
neutral (?all)
DMARC
v=DMARC1;p=quarantine;sp=none;pct=100;rua=mailto:postmaster@coolnet.cz;ruf=mailto:postmaster@coolnet.cz
policy: quarantine · sp=none
DKIM
  • mail: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3RKC3T6PB0jX2RLP4eG8IS5kqImkTA8B2QN0A8oB5Mz0Wm44wzdCpvJg3PgZQgzk0BVGU0roJ56KD8…
selectors probed

Certificate (current)

R13
from 2026-04-02 to 2026-07-01
Expires in 29 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://coolnet.cz/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=15768000; includeSubDomains; preload

Links to (5)

Linked from (1)