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unrecognised fingerprint

t13d1313h2_f57a46bbacb6_7f0f34a4126d

Multiple builds

A few stable builds share this JA4 — not per-connection randomisation, and not yet a named client.

TLS 1.3ALPN h2 · http/1.12026-07-19 → 2026-07-23
JA4
JA4_r
JA3
several builds share this JA4 under different JA3s — no single value is canonical.
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
multi-build · 41 JA3 — 41 JA3s over 2359 connections, but most repeat: a handful of stable builds sharing one JA4 rather than per-connection randomisation.
reach
0.452 roams across 67 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

2,359
observations
67
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 1.3
ALPN (wire order)
h2, http/1.1
EC point formats
0x0000
Post-quantum key share
present (X25519MLKEM768)

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(13)
  1. 00x1302TLS_AES_256_GCM_SHA384
  2. 10x1301TLS_AES_128_GCM_SHA256
  3. 20x1303TLS_CHACHA20_POLY1305_SHA256
  4. 30xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  5. 40xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  6. 50xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  7. 60xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  8. 70xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  9. 80xcca8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
  10. 90xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  11. 100xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  12. 110xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  13. 120xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
extensions(13)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. 60x0012signed_certificate_timestamp
  8. 70x0017extended_master_secret
  9. 80x001bcompress_certificate
  10. 90x002bsupported_versions
  11. 100x002dpsk_key_exchange_modes
  12. 110x0033key_share
  13. 120xff01renegotiation_info

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

curves / groups(5)
  1. 00x11ecX25519MLKEM768 PQ
  2. 10x001dx25519
  3. 20x0017secp256r1 (P-256)
  4. 30x0018secp384r1 (P-384)
  5. 40x0019secp521r1 (P-521)
signature algorithms(10)
  1. 00x0403ecdsa_secp256r1_sha256
  2. 10x0804rsa_pss_rsae_sha256
  3. 20x0401rsa_pkcs1_sha256
  4. 30x0503ecdsa_secp384r1_sha384
  5. 40x0805rsa_pss_rsae_sha384
  6. 50x0805rsa_pss_rsae_sha384
  7. 60x0501rsa_pkcs1_sha384
  8. 70x0806rsa_pss_rsae_sha512
  9. 80x0601rsa_pkcs1_sha512
  10. 90x0201rsa_pkcs1_sha1

JA3 variants

41 distinct JA3 hashes collapse into this one JA4.

#JA3JA3_rawobsshare
0771,4866-4865-4867-491…23-24-25,02,31598%
1771,4866-4867-4865-491…23-24-25,050.2%
2771,4866-4867-4865-491…23-24-25,01<0.1%
3771,4866-4867-4865-491…23-24-25,01<0.1%
4771,4866-4867-4865-491…23-24-25,01<0.1%
5771,4866-4867-4865-491…23-24-25,01<0.1%
6771,4866-4867-4865-491…23-24-25,01<0.1%
7771,4866-4867-4865-491…23-24-25,01<0.1%
8771,4866-4867-4865-491…23-24-25,01<0.1%
9771,4866-4867-4865-491…23-24-25,01<0.1%
10771,4866-4867-4865-491…23-24-25,01<0.1%
11771,4866-4867-4865-491…23-24-25,01<0.1%
12771,4866-4867-4865-491…23-24-25,01<0.1%
13771,4866-4867-4865-491…23-24-25,01<0.1%
14771,4866-4867-4865-491…23-24-25,01<0.1%
15771,4866-4867-4865-491…23-24-25,01<0.1%
16771,4866-4867-4865-491…23-24-25,01<0.1%
17771,4866-4867-4865-491…23-24-25,01<0.1%
18771,4866-4867-4865-491…23-24-25,01<0.1%
19771,4866-4867-4865-491…23-24-25,01<0.1%

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. Showing the busiest 20.

Reach — domains contacted

Top 15 of 67. Share is the fraction of this fingerprint’s observations reaching each name.