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unrecognised fingerprint

t12d2805h1_d943125447b4_aaf95bb78ec9

Deterministic client

One JA3 across every connection — a deterministic stack, the shape of a library or command-line client, with no catalogue name yet.

TLS 1.2ALPN http/1.12026-07-20 → 2026-07-23
JA4
JA4_r
JA3
JA3_raw

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catalog identity
No ground-truth build has reproduced this hello yet — absence is not a verdict.
self-randomisation
fixed — one JA3 across 83 connections: a deterministic stack. Libraries and command-line clients look like this.
reach
0.424 roams across 14 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

83
observations
14
domains reached
2026-07-20
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)
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(28)
  1. 00xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  2. 10xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  3. 20xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  4. 30xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  5. 40xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  6. 50xcca8TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
  7. 60x009fTLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  8. 70x009eTLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  9. 80xccaaTLS_DHE_RSA_WITH_CHACHA20_POLY1305
  10. 90xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  11. 100xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  12. 110xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  13. 120xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  14. 130xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  15. 140xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  16. 150xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  17. 160xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  18. 170x006bTLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  19. 180x0039TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  20. 190x0067TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  21. 200x0033TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  22. 210x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  23. 220x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  24. 230x003dTLS_RSA_WITH_AES_256_CBC_SHA256
  25. 240x0035TLS_RSA_WITH_AES_256_CBC_SHA
  26. 250x003cTLS_RSA_WITH_AES_128_CBC_SHA256
  27. 260x002fTLS_RSA_WITH_AES_128_CBC_SHA
  28. 270x00ffTLS_EMPTY_RENEGOTIATION_INFO
extensions(5)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000bec_point_formats
  4. 30x000dsignature_algorithms
  5. 40x0010application_layer_protocol_negotiation (ALPN)

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(13)
  1. 00x0601rsa_pkcs1_sha512
  2. 10x0603ecdsa_secp521r1_sha512
  3. 20xefefunknown (0xefef)
  4. 30x0501rsa_pkcs1_sha384
  5. 40x0503ecdsa_secp384r1_sha384
  6. 50x0401rsa_pkcs1_sha256
  7. 60x0403ecdsa_secp256r1_sha256
  8. 70xeeeeunknown (0xeeee)
  9. 80xededunknown (0xeded)
  10. 90x0301rsa_pkcs1_sha256 (legacy)
  11. 100x0303rsa_pkcs1_sha512 (legacy)
  12. 110x0201rsa_pkcs1_sha1
  13. 120x0203ecdsa_sha1

Reach — domains contacted

Top 14 of 14. Share is the fraction of this fingerprint’s observations reaching each name.