server name
connectivitycheck.gstatic.com
Mixed audience
A mix of client stacks reach this name, none dominating.
- domain
Read
client diversity
4 distinct client stacks reach this name.
concentration
0.740 traffic splits near-evenly across many unrelated stacks.
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
77
observations
4
distinct clients
2026-07-19
first seen
2026-07-23
last seen
Client stacks reaching this name
- 47%
- 43%
- t12d1410h1_c86…2b2eb673multi-build5.2%
- t12d1409h1_c86…e8c56a14multi-build5.2%
Busiest 4 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 |
|---|---|---|---|---|---|---|
| Android (Conscrypt) / Flutter (BoringSSL) mobile-BoringSSL cipher-suite signature — Android system TLS (Play Services, Firebase, OkHttp apps) and Flutter/Dart; any ALPN | c67e9dc2…670c21 | fixed | 36 | 47% | 2026-07-19 | 2026-07-23 |
| Android — Firebase / Google services (Conscrypt) Android system TLS (Conscrypt/BoringSSL); h1 — firebaseinstallations, clientservices | 9b02ebd3…621dc8 | fixed | 33 | 43% | 2026-07-19 | 2026-07-23 |
| t12d1410h1_c866b…2b2eb673 | — | multi-build | 4 | 5.2% | 2026-07-19 | 2026-07-23 |
| t12d1409h1_c866b…e8c56a14 | — | multi-build | 4 | 5.2% | 2026-07-23 | 2026-07-23 |