server name
challenges.cloudflare.com
Mixed audience
A mix of client stacks reach this name, none dominating.
- domain
Read
client diversity
15 distinct client stacks reach this name.
concentration
0.445one client stack dominates — normal for an API or a CDN origin.
Spread is entropy over the fingerprints reaching this domain, not over the domains a fingerprint reaches. It can’t distinguish one scraper from many people — it measures the mix of software, not who runs it.
Footprint
1,328
observations
15
distinct clients
2026-07-19
first seen
2026-07-23
last seen
Client stacks reaching this name
- Google Chrome / Chromiumrandomising58%
- Google Chrome / Chromiumrandomising22%
- Google Chrome / Chromiumrandomising9.6%
- Google Chrome / Chromiumrandomising8.6%
- Google Chrome / Chromiumrandomising0.5%
- Mozilla Firefoxfixed0.4%
- Android (Conscrypt) / Flutter (BoringSSL)multi-build0.2%
- Google Chrome / Chromiumrandomising0.2%
- Google Chrome / Chromiummulti-build0.2%
- Google Chrome / Chromiumrandomising0.2%
- Apple Safari / WebKitmulti-build<0.1%
- Google Chrome / Chromiumrandomising<0.1%
- Google Chrome / Chromiumrandomising<0.1%
- Mozilla Firefoxfixed<0.1%
- Google Chrome / Chromiumrandomising<0.1%
Busiest 15 client stacks on this page. Share is the fraction of this name’s observations. Many distinct fingerprints on a low-traffic name is itself worth a look; a blank JA3 is a permuting client — open the fingerprint for its variants.
| client | JA3 | stability | count | share | first seen | last seen |
|---|---|---|---|---|---|---|
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 768 | 58% | 2026-07-19 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 293 | 22% | 2026-07-20 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 127 | 9.6% | 2026-07-19 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 114 | 8.6% | 2026-07-19 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 7 | 0.5% | 2026-07-20 | 2026-07-23 |
| Mozilla Firefox Firefox cipher-suite signature — also forks (Zen, LibreWolf, Tor Browser); any extension permutation or version | 6447ab08…a89e87 | fixed | 5 | 0.4% | 2026-07-20 | 2026-07-22 |
| Android (Conscrypt) / Flutter (BoringSSL) mobile-BoringSSL cipher-suite signature — Android system TLS (Play Services, Firebase, OkHttp apps) and Flutter/Dart; any ALPN | — | multi-build | 3 | 0.2% | 2026-07-19 | 2026-07-19 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 2 | 0.2% | 2026-07-19 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | multi-build | 2 | 0.2% | 2026-07-22 | 2026-07-22 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 2 | 0.2% | 2026-07-23 | 2026-07-23 |
| Apple Safari / WebKit Apple SecureTransport cipher-suite signature — Safari (macOS/iOS), WKWebView, and native URLSession apps; the 3DES legacy tail (0xC008/0xC012/0x000A) is Apple's tell, no other modern stack carries it. Platform entry like Android's Conscrypt: Apple system TLS legitimately offers any ALPN (h2, http/1.1, dot, none), so the cipher list alone is the signature — not ALPN-gated | — | multi-build | 1 | <0.1% | 2026-07-23 | 2026-07-23 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 1 | <0.1% | 2026-07-19 | 2026-07-19 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 1 | <0.1% | 2026-07-22 | 2026-07-22 |
| Mozilla Firefox Firefox cipher-suite signature — also forks (Zen, LibreWolf, Tor Browser); any extension permutation or version | f19d54c8…7448e9 | fixed | 1 | <0.1% | 2026-07-22 | 2026-07-22 |
| Google Chrome / Chromium Chromium cipher-suite signature — Chrome, Edge, Brave, Opera; any extension permutation or version | — | randomising | 1 | <0.1% | 2026-07-22 | 2026-07-22 |