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unrecognised fingerprint

t12d1208h2_d34a8e72043a_31a7e1922da8

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 → 2026-07-21
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 · 17 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
0.791 roams across 3 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

17
observations
3
domains reached
2026-07-19
first seen
2026-07-21
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(8)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000bec_point_formats
  4. 30x000dsignature_algorithms
  5. 40x0010application_layer_protocol_negotiation (ALPN)
  6. 50x0017extended_master_secret
  7. 60x0023session_ticket
  8. 70xff01renegotiation_info

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

curves / groups(3)
  1. 00x0017secp256r1 (P-256)
  2. 10x0018secp384r1 (P-384)
  3. 20x0019secp521r1 (P-521)
signature algorithms(10)
  1. 00x0601rsa_pkcs1_sha512
  2. 10x0603ecdsa_secp521r1_sha512
  3. 20x0501rsa_pkcs1_sha384
  4. 30x0503ecdsa_secp384r1_sha384
  5. 40x0401rsa_pkcs1_sha256
  6. 50x0403ecdsa_secp256r1_sha256
  7. 60x0301rsa_pkcs1_sha256 (legacy)
  8. 70x0303rsa_pkcs1_sha512 (legacy)
  9. 80x0201rsa_pkcs1_sha1
  10. 90x0203ecdsa_sha1

JA3 variants

17 distinct JA3 hashes collapse into this one JA4.

#JA3JA3_rawobsshare
0771,49195-49196-52393-…23-24-25,015.9%
1771,49195-49196-52393-…23-24-25,015.9%
2771,49195-49196-52393-…23-24-25,015.9%
3771,49195-49196-52393-…23-24-25,015.9%
4771,49195-49196-52393-…23-24-25,015.9%
5771,49195-49196-52393-…23-24-25,015.9%
6771,49195-49196-52393-…23-24-25,015.9%
7771,49195-49196-52393-…23-24-25,015.9%
8771,49195-49196-52393-…23-24-25,015.9%
9771,49195-49196-52393-…23-24-25,015.9%
10771,49195-49196-52393-…23-24-25,015.9%
11771,49195-49196-52393-…23-24-25,015.9%
12771,49195-49196-52393-…23-24-25,015.9%
13771,49195-49196-52393-…23-24-25,015.9%
14771,49195-49196-52393-…23-24-25,015.9%
15771,49195-49196-52393-…23-24-25,015.9%
16771,49195-49196-52393-…23-24-25,015.9%

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 3 of 3. Share is the fraction of this fingerprint’s observations reaching each name.