🌐
proton.app 400
🔒 SSL Valid
HTTP Status A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
400
SSL Expires When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 7d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 195d
Hosting The company and location where this website's server is physically located.Read more →
Unknown
Security Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
0/3
IP Address The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
57.145.2.141
Performance Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability.
100
mob
Uptime
100%
Performance Lighthouse performance score from Google PageSpeed Insights (0–100). Measures real-world loading speed, interactivity and visual stability. 100
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Mobile
Score
Accessibility
Best Practices
SEO
LCP
0.76s
CLS
0.000
FCP
0.76s
TTFB
0.00s
TBT
0ms
SI
0.76s
Checked: 2026-09-03 00:55:39.969121 · View on PageSpeed
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools.
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No technologies detected
Screenshot
2026-09-02
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Captured: 2026-09-02 11:43:35 · 2.1 KB
DNS Records DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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| A (IPv4) | 57.145.2.141 |
| AAAA (IPv6) | 2a03:2880:f381:8d:face:b00c::2 |
| NS | d.ns.facebook.comb.ns.facebook.comc.ns.facebook.coma.ns.facebook.com |
| TXT (2) |
+1 other TXT record(s)
Show all TXT records1f22d470ddc84cd191bbf9fdf3470229 v=spf1 a ~all |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | RegistrarSEC, LLC |
| Registered | 2018-05-05 |
| Expires | 2027-05-05 (in 195 days) |
| Last Updated | 2026-06-19 |
| Status | client delete prohibitedclient transfer prohibitedclient update prohibited |
SSL Certificate Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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| Subject (CN) | proton.app |
| Issuer | DigiCert Inc |
| Valid From | 2026-07-31 |
| Valid Until | 2026-10-29 (7 days left) |
| SANs (2) | proton.appwww.proton.app |
HTTP Headers Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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| Status | 400 |
| Server | N/A |
| Content-Type | text/html; charset="utf-8" |
| Final URL | https://proton.app/ |
Security headers HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
Hosting Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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| IP Address | 57.145.2.141 |
| Provider | Unknown |
| Organization | N/A |
| ASN | N/A |
| Location | N/A |
Security Score
F (1/7)
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Sitemap & Robots
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No robots.txt
This site has no robots.txt file, so crawlers may access everything by default.
| Sitemap | Not found |
Social & Meta Tags
Missing
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| Title | Error |
| Language | en |
Mail Security Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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| SPF | ✓ Present v=spf1 a ~all |
| DMARC | Not set |
Other TLDs Other top-level domain variants of this domain name and their availability. 21 active 2 for sale
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Uptime Monitor
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| Current Status | 🟢 Client Error |
| HTTP Status | 400 |
| Response Time | 29ms |
| Last Checked | 2026-10-19 01:00:56.832904 |
| Uptime (30d) | 100% |
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