signal.org 200
🔒 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 →
200
SSL Expires When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 46d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
in 604d
Hosting The company and location where this website's server is physically located.Read more →
Cloudflare
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 →
104.18.10.47
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 2
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🌐 CDN
Cloudflare
📦 JS Library
jQuery 3.7.1.
Screenshot 2026-08-20
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Captured: 2026-08-20 04:50:54 · 20.8 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) | 104.18.11.47104.18.10.47 |
| AAAA (IPv6) | 2606:4700::6812:b2f2606:4700::6812:a2f |
| NS | zita.ns.cloudflare.comcasey.ns.cloudflare.com |
| MX | 5 alt2.aspmx.l.google.com1 aspmx.l.google.com10 aspmx2.googlemail.com10 aspmx3.googlemail.com5 alt1.aspmx.l.google.com |
| TXT | atlassian-domain-verification=E0za3YlmgyiE3wck1TFwdW1j0dbRUDsSNh9VBjrOx4yMWdOdauAaLczjR2c/FFmr google-site-verification=E9NOI9LjgLb5GEyCWbHTr8yumWFOdOuCtFkCeQ_GhVM v=spf1 include:_spf.google.com ~all MS=ms64370964 anthropic-domain-verification-w1sp3g=yHrFLemYCHqI7Xa0hqH80GBFR |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | MarkMonitor Inc. |
| Registered | 2001-04-15 |
| Expires | 2028-04-15 (in 604 days) |
| Last Updated | 2026-08-12 |
| Status | client delete prohibitedserver delete prohibitedclient transfer prohibitedserver transfer prohibitedclient update prohibitedserver 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) | signal.org |
| Issuer | Google Trust Services |
| Valid From | 2026-07-07 |
| Valid Until | 2026-10-05 (46 days left) |
| SANs (1) | signal.org |
HTTP Headers Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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| Status | 200 |
| Server | cloudflare |
| Content-Type | text/html; charset=utf-8 |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| cache-control | public, max-age=0, must-revalidate |
| cf-ray | a2df88a23cade03a-IAD |
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 | 104.18.10.47 |
| Provider | Cloudflare |
| Organization | Cloudflare, Inc. |
| ASN | AS13335 |
| Country | US |
| City | San Francisco |
Security Score
D (3/7)
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Sitemap & Robots
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| robots.txt | Not found |
| Sitemap | Not found |
Social & Meta Tags
Complete
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| Title | Signal >> Home |
| OG Title | Signal Messenger: Speak Freely |
| OG Description | Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect. |
| OG Image | https://signal.org/assets/images/og/og-image.png |
| OG Type | website |
| OG Site Name | Signal Messenger |
| Twitter Card | app |
| 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 include:_spf.google.com ~all |
| DMARC | ✓ Present v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected] |
| MX Records | 5 → alt2.aspmx.l.google.com 1 → aspmx.l.google.com 10 → aspmx2.googlemail.com 10 → aspmx3.googlemail.com 5 → alt1.aspmx.l.google.com |