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unrecognised fingerprint

t12d1209h2_d34a8e72043a_e08eabe7240f

Randomising client

Reshuffles its own ClientHello per connection — browser-shaped behaviour, but no catalogue build has reproduced this exact hello.

TLS 1.2ALPN h2 · http/1.12026-07-19 → 2026-07-23
JA4
JA4_r
JA3
permutes its ClientHello, so every connection emits a fresh JA3 — none represents it.
JA3_raw
—

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Read

catalog identity
No ground-truth build has reproduced this hello yet — absence is not a verdict.
self-randomisation
randomising · 16 JA3 — 100% of connections presented a JA3 never seen before for this client — it reshuffles its own ClientHello. Chrome has permuted extension order since version 110.
real-browser tell
Browser-shaped cipher list but no post-quantum key share — the tell that separates curl-impersonate / uTLS from a real Chrome.
reach
0.662 roams across 4 domains — spread is how evenly, not how many.

Spread measures reach, not intent: it can’t tell one scraper visiting 500 domains from 500 people visiting one each. Stability is a claim about software — whether the stack is deterministic — nothing about who runs it.

Footprint

16
observations
4
domains reached
2026-07-19
first seen
2026-07-23
last seen

ClientHello anatomy

The underscore groups of JA4_r are the raw cipher suites · extensions · signature algorithms behind the hash.

TLS version
TLS 1.2
ALPN (wire order)
h2, http/1.1
EC point formats
0x0000
Post-quantum key share
absent

The post-quantum key share is a structural fact about the hello, not a verdict — GREASE values are flagged the same neutral way.

cipher suites(12)
  1. 00xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  2. 10xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  3. 20xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  4. 30xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  5. 40xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  6. 50xcca8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
  7. 60xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  8. 70xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  9. 80x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  10. 90x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  11. 100x002fTLS_RSA_WITH_AES_128_CBC_SHA
  12. 110x0035TLS_RSA_WITH_AES_256_CBC_SHA
extensions(9)sorted
  1. 00x0000server_name (SNI)
  2. 10x0005status_request (OCSP)
  3. 20x000asupported_groups
  4. 30x000bec_point_formats
  5. 40x000dsignature_algorithms
  6. 50x0010application_layer_protocol_negotiation (ALPN)
  7. 60x0017extended_master_secret
  8. 70x0023session_ticket
  9. 80xff01renegotiation_info

Stored sorted — under one JA4 the wire order varies by construction, so no single order is “the” order.

curves / groups(3)
  1. 00x001dx25519
  2. 10x0017secp256r1 (P-256)
  3. 20x0018secp384r1 (P-384)
signature algorithms(7)
  1. 00x0403ecdsa_secp256r1_sha256
  2. 10x0401rsa_pkcs1_sha256
  3. 20x0503ecdsa_secp384r1_sha384
  4. 30x0501rsa_pkcs1_sha384
  5. 40x0603ecdsa_secp521r1_sha512
  6. 50x0601rsa_pkcs1_sha512
  7. 60x0201rsa_pkcs1_sha1

JA3 variants

16 distinct JA3 hashes collapse into this one JA4.

#JA3JA3_rawobsshare
0771,49195-49196-52393-…29-23-24,016.3%
1771,49195-49196-52393-…29-23-24,016.3%
2771,49195-49196-52393-…29-23-24,016.3%
3771,49195-49196-52393-…29-23-24,016.3%
4771,49195-49196-52393-…29-23-24,016.3%
5771,49195-49196-52393-…29-23-24,016.3%
6771,49195-49196-52393-…29-23-24,016.3%
7771,49195-49196-52393-…29-23-24,016.3%
8771,49195-49196-52393-…29-23-24,016.3%
9771,49195-49196-52393-…29-23-24,016.3%
10771,49195-49196-52393-…29-23-24,016.3%
11771,49195-49196-52393-…29-23-24,016.3%
12771,49195-49196-52393-…29-23-24,016.3%
13771,49195-49196-52393-…29-23-24,016.3%
14771,49195-49196-52393-…29-23-24,016.3%
15771,49195-49196-52393-…29-23-24,016.3%

JA3 hashes preserve wire order, so a permuting client mints a new one per connection; JA4 sorts the same set, which is why they share one JA4. Every hash here belongs to this fingerprint — there is no per-JA3 page.

Reach — domains contacted

Top 4 of 4. Share is the fraction of this fingerprint’s observations reaching each name.