F
EU hosting · neutral frontend
Our scan on 4 August 2026 found that kostelecnlab.cz does not route email through any identified third-party provider.
Infrastructure — scan 2026-08-04
IP address
78.156.158.199
ASN
AS43542
· OptoNet-AS OptoNet Communication, spol. s.r.o. Unknown
Services (US)
Google reCAPTCHA
Google reCAPTCHA v2
Google Fonts
Cloudflare
Cloudflare CDNJS
Services (EU)
None detected
A++ (best)F (worst)
today
Only 8 scans on record.
History builds daily — check back tomorrow.
Change log
No changes detected yet. Monitoring daily.
Methodology note: This report reflects a point-in-time automated scan of
public infrastructure data — DNS MX records, ASN routing via RIPE Stat API, SSL certificate
issuer, and HTML pattern matching against known service signatures. It is not a legal
determination of GDPR compliance or any regulatory obligation. Infrastructure can change at
any time; the grade reflects configuration at scan timestamp only. Scan data is reproducible.
View full methodology →
Reproduce this scan
dig kostelecnlab.cz MX
dig kostelecnlab.cz A
curl "https://stat.ripe.net/data/prefix-overview/data.json?resource=78.156.158.199"
openssl s_client -connect kostelecnlab.cz:443 -showcerts 2>/dev/null | openssl x509 -noout -issuer
Data sources:
RIPE Stat API (ASN lookup)