signal.org
No paid content found
Multilingual
Categories: Security & Privacy
Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect.
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Updated: 2026-09-23 09:09
Language: English (default)
Access: Normal
Profile views 1
Outbound visits 0
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Website Overview
An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Several search or sharing settings need attention. Together they may make snippets, preview images or preferred URLs less consistent across platforms.
Domain and Registration
Registered in 2001, this domain has about 25 years of history. That suggests continuity, although ownership and purpose may have changed. The registrar, MarkMonitor Inc., specializes in corporate domain and brand management, suggesting attention to domain asset protection. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The domain uses the common .org extension, which is not an independent safety signal.
DNS and Email
Nameservers are provided by Cloudflare, indicating managed DNS hosting. MX records point to the Google Workspace email service. DNSSEC is enabled, allowing validating resolvers to authenticate signed DNS data. No CNAME was found; the observed records resolve directly to addresses. SPF and DMARC are configured. DKIM status is unknown.
TLS and Certificates
The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued within the Google Trust Services cloud or CDN ecosystem. The certificate's total validity is about 90 days, consistent with a short renewal cycle.
HTTP and Browser Security
The response lacks these common security headers: HSTS, CSP, Permissions-Policy, clickjacking protection. CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers.
Technology Stack Analysis
The public page identifies Cloudflare without precise versions, leaving fewer clues for version-specific scanning.
Search and Social Sharing
No homepage meta description was detected, leaving snippet selection more dependent on page text. No homepage canonical URL was detected. If duplicate URLs exist, consolidation may be less explicit. Twitter Card metadata is configured. The page declares 50 language or regional alternatives using hreflang. The title has 14 characters, within a common display range.
Hosting and Email
Cloudflare
Hosting
Google Workspace
Location
United States
Pages, Search and Sharing
| Meta description | Not detected |
|---|---|
| Canonical URL | Not detected |
| Language | English (default) · Multilingual |
| Twitter Card | app |
Social Sharing Preview
10 fields
Sharing metadata
| og:url | https://signal.org/ |
|---|---|
| og:type | website |
| og:image | https://signal.org/assets/images/og/og-image.png |
| og:title | Signal Messenger: Speak Freely |
| og:site_name | Signal Messenger |
| og:description | Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect. |
| og:image:width | 1200 |
| og:image:height | 630 |
| twitter:card | app |
| twitter:site | @signalapp |
robots.txt (opens in a new tab)
HTTP 404No robots.txt found
Sitemaps
0No sitemaps found
Registration details RDAP / WHOIS
| Registrar | MarkMonitor Inc. |
|---|---|
| Registered | 2001-04-15 |
| Expires | 2028-04-15 |
| Domain status | client delete prohibited、server delete prohibited、client transfer prohibited、server transfer prohibited、client update prohibited、server update prohibited |
| Nameservers | casey.ns.cloudflare.com、zita.ns.cloudflare.com |
| DNSSEC | signed |
DNS records
| Type | Name | Value | TTL | Priority |
|---|---|---|---|---|
| A | signal.org | 104.18.10.47 | 300 | — |
| A | signal.org | 104.18.11.47 | 300 | — |
| AAAA | signal.org | 2606:4700::6812:a2f | 144 | — |
| AAAA | signal.org | 2606:4700::6812:b2f | 144 | — |
| MX | signal.org | aspmx.l.google.com | 300 | 1 |
| MX | signal.org | alt1.aspmx.l.google.com | 300 | 5 |
| MX | signal.org | alt2.aspmx.l.google.com | 300 | 5 |
| MX | signal.org | aspmx2.googlemail.com | 300 | 10 |
| MX | signal.org | aspmx3.googlemail.com | 300 | 10 |
| NS | signal.org | casey.ns.cloudflare.com | 86400 | — |
| NS | signal.org | zita.ns.cloudflare.com | 86400 | — |
| TXT | signal.org | MS=ms64370964 | 300 | — |
| TXT | signal.org | anthropic-domain-verification-w1sp3g=yHrFLemYCHqI7Xa0hqH80GBFR | 300 | — |
| TXT | signal.org | atlassian-domain-verification=E0za3YlmgyiE3wck1TFwdW1j0dbRUDsSNh9VBjrOx4yMWdOdauAaLczjR2c/FFmr | 300 | — |
| TXT | signal.org | google-site-verification=E9NOI9LjgLb5GEyCWbHTr8yumWFOdOuCtFkCeQ_GhVM | 300 | — |
| TXT | signal.org | v=spf1 include:_spf.google.com ~all | 300 | — |
| DS | signal.org | 2371 13 2 e365255a4be6596861ff0484bca70173c3ca25d847da2309222af3c41d85f76c | 3600 | — |
| DMARC | _dmarc.signal.org | v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected] | 300 | — |
TLS and certificates
| Assessment | Normal configuration |
|---|---|
| Supported protocols | TLSv1.2、TLSv1.3 |
| Negotiated protocol | TLSv1.3 |
| Certificate subject | signal.org |
| Issuer | Google Trust Services |
| Valid until | 2026-12-03T17:58 · Remaining when checked: 71 days |
| Verification details | Certificate trust: Passed · Hostname match: Passed |
HTTP response headers
| Header | Value |
|---|---|
| content-type | text/html; charset=utf-8 |
| cache-control | public, max-age=0, must-revalidate |
| server | cloudflare |
| x-content-type-options | nosniff |
| referrer-policy | strict-origin-when-cross-origin |
| access-control-allow-origin | * |
Identified technologies
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