Energetický regulační úřad
F
EU hosting · US email +
services
Our scan on 4 June 2026 found that eru.cz routes email through Microsoft 365, a US-based email security provider.
Infrastructure — scan 2026-06-04
ASN
AS5610
· O2-CZECH-REPUBLIC O2 Czech Republic, a.s. Unknown
Email (MX)
Microsoft 365
US
Services (US)
Google Tag Manager
Google Fonts
Google Fonts CDN
Cloudflare
Cloudflare Turnstile
jsDelivr CDN
Services (EU)
None detected
A++ (best)F (worst)
today
Only 3 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 eru.cz MX
dig eru.cz A
curl "https://stat.ripe.net/data/prefix-overview/data.json?resource=194.228.82.14"
openssl s_client -connect eru.cz:443 -showcerts 2>/dev/null | openssl x509 -noout -issuer
Data sources:
RIPE Stat API (ASN lookup)