What powers 
email.cz?
Last seen Nov 2023 · 4 technologies across 3 categories
AI Crawlers
robots.txt could not be read at the last check (Nov 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 64% desktop
- 35% phone
- 1% tablet
Czechia
Germany
United Kingdom
Netherlands
France
Poland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.04 / 10 · ranked #107,254 of all domains
191 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.2 s |
| INP | 150 ms |
| CLS | 0.05 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Infrastructure
- Registered Nov 1997 (28 years), renews Oct 2027
- Hosted on SEZNAM- (77.75.78.196, IPv6)
- DNS: Seznam Email
- Email: no MX record returned
- Email security: SPF (neutral), DMARC monitor only, DNSSEC signed, CAA
- SSL: Let's Encrypt, ECDSA P256, expires Dec 2026
- Common Crawl link graph: rank 75,242, 8 hosts
- Verified with: Google, Yahoo
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| lab.email.cz | 4 |
| www.email.cz | 4 |