Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 46.255.231.129 |
| Server Software | cloudflare |
| CDN | Cloudflare |
| Compression | gzip |
|
🔄 🟡 Long Redirect Chain | There are 4 redirects, which may affect SEO and performance. |
|
🔒 🟡 Mixed Content (2 HTTP resources) | The page is served over HTTPS but loads 2 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 46.255.231.129
Server Software cloudflare
CDN Cloudflare
Compression gzip
🔄 🟡 Long Redirect Chain There are 4 redirects, which may affect SEO and performance.
🔒 🟡 Mixed Content (2 HTTP resources) The page is served over HTTPS but loads 2 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://volny.cz:443 | 301 | HTTP/1.1 301 Moved Permanently |
| 2 | https://volny.centrum.cz/ | 307 | HTTP/2 307 |
| 3 | https://ecoid-ts.id-eco.cz/pid?sid=q-aLE_0d9zmiRRslWFDJK&origin-url=https%3A%2F%2Fvolny.centrum.cz%2F | 307 | HTTP/2 307 |
| 4 | https://volny.centrum.cz/?lp=1 | 200 | HTTP/2 200 |
#1 URL https://volny.cz:443
HTTP Status Code 301
Status HTTP/1.1 301 Moved Permanently
#2 URL https://volny.centrum.cz/
HTTP Status Code 307
Status HTTP/2 307
#3 URL https://ecoid-ts.id-eco.cz/pid?sid=q-aLE_0d9zmiRRslWFDJK&origin-url=https%3A%2F%2Fvolny.centrum.cz%2F
HTTP Status Code 307
Status HTTP/2 307
#4 URL https://volny.centrum.cz/?lp=1
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 1.6 ms |
| TCP Connect | 3.6 ms |
| TLS Handshake | 8.6 ms |
| Time To First Byte (TTFB) | 243 ms |
| Content Download | 53.8 ms |
| Total Response Time | 296.8 ms |
DNS Lookup 1.6 ms
TCP Connect 3.6 ms
TLS Handshake 8.6 ms
Time To First Byte (TTFB) 243 ms
Content Download 53.8 ms
Total Response Time 296.8 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Volny.cz: Fandíme dobrému obsahu |
| Meta Description | Volný.cz je český internetový portál nabízející e-mail, aktuální zpravodajství, počasí a další zajímavé služby. |
| Canonical | https://www.centrum.cz |
| Robots Meta | index, follow |
Title Volny.cz: Fandíme dobrému obsahu
Meta Description Volný.cz je český internetový portál nabízející e-mail, aktuální zpravodajství, počasí a další zajímavé služby.
Canonical https://www.centrum.cz
Robots Meta index, follow
Detected Technologies
| Technology | WordPress React Google Analytics Google Tag Manager Cloudflare PHP Next.js |
Technology WordPress React Google Analytics Google Tag Manager Cloudflare PHP Next.js
HTTP Headers
| Date
| Thu, 23 Jul 2026 19:50:24 GMT |
| Content-type
| text/html; charset=utf-8 |
| Cf-ray
| a1fd36c3e8e6288f-CDG |
| Cf-cache-status
| EXPIRED |
| Cache-control
| public, max-age=180, s-maxage=180, stale-while-revalidate=59 |
| Last-modified
| Thu, 23 Jul 2026 19:50:24 GMT |
| Link
| ; rel=preconnect; crossorigin="", ; rel=preload; as="style" |
| Server
| cloudflare |
| Vary
| rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding |
| X-device-viewport
| desktop |
| X-powered-by
| Next.js |
| X-sid-cookie
| |
| Report-to
| {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=0IziV7%2FXKcshW2TBd3%2F0CgRpqMtC0fmiAedFAncaCBPh%2F5y8BNGEyO8uo6If%2FgTTR4%2BG%2BFtTW7UgrEKmwciV7fSlhC17sK2ArdL5%2F8Wy0ngBOk5SEemR16xE%2Fn8iH7rEQa40amIX%2B6nfqcpwpeU%3D"}]} |
| Nel
| {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} |
| Content-encoding
| gzip |
Meta Tags
| Viewport | width=device-width, initial-scale=1 |
| Description | Volný.cz je český internetový portál nabízející e-mail, aktuální zpravodajství, počasí a další zajímavé služby. |
| Robots | index, follow |
| Referrer | unsafe-url |
| Msapplication-TileColor | #1d8ce5 |
| Msapplication-TileImage |  |
| Msapplication-square70x70logo |  |
| Msapplication-square150x150logo |  |
| Msapplication-wide310x150logo |  |
| Msapplication-square310x310logo |  |
| Sentry-trace | 5ee909877743a9120d195e492cff84ad-3de090eca0c2cdf7-0 |
| Baggage | sentry-environment=production,sentry-public_key=63543a0942dba55efffef410e8a8e08f,sentry-trace_id=5ee909877743a9120d195e492cff84ad,sentry-org_id=160707,sentry-sampled=false,sentry-sample_rand=0.5538307037806139,sentry-sample_rate=0.01 |
Date Thu, 23 Jul 2026 19:50:24 GMT
Content-type text/html; charset=utf-8
Cf-ray a1fd36c3e8e6288f-CDG
Cf-cache-status EXPIRED
Cache-control public, max-age=180, s-maxage=180, stale-while-revalidate=59
Last-modified Thu, 23 Jul 2026 19:50:24 GMT
Link ; rel=preconnect; crossorigin="", ; rel=preload; as="style"
Server cloudflare
Vary rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding
X-device-viewport desktop
X-powered-by Next.js
X-sid-cookie
Report-to {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=0IziV7%2FXKcshW2TBd3%2F0CgRpqMtC0fmiAedFAncaCBPh%2F5y8BNGEyO8uo6If%2FgTTR4%2BG%2BFtTW7UgrEKmwciV7fSlhC17sK2ArdL5%2F8Wy0ngBOk5SEemR16xE%2Fn8iH7rEQa40amIX%2B6nfqcpwpeU%3D"}]}
Nel {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
Content-encoding gzip
