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unrecognised fingerprint

t12d4906h1_730fb1b0ac6a_22a92d800fe4

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/1.12026-07-19 → 2026-07-23
JA4
JA4_r
JA3
JA3_raw
This JA3 resolves unambiguously to the JA4 above.

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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 40 connections: a deterministic stack. Libraries and command-line clients look like this.
reach
0.462 roams across 5 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

40
observations
5
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)
http/1.1
EC point formats
0x0000, 0x0001, 0x0002
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(49)
  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. 40x009fTLS_DHE_RSA_WITH_AES_256_GCM_SHA384
  6. 50x009eTLS_DHE_RSA_WITH_AES_128_GCM_SHA256
  7. 60xc032unknown (0xc032)
  8. 70xc02eunknown (0xc02e)
  9. 80xc031unknown (0xc031)
  10. 90xc02dunknown (0xc02d)
  11. 100x00a5unknown (0x00a5)
  12. 110x00a1unknown (0x00a1)
  13. 120x00a4unknown (0x00a4)
  14. 130x00a0unknown (0x00a0)
  15. 140xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  16. 150xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  17. 160xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  18. 170xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  19. 180xc02aunknown (0xc02a)
  20. 190xc026unknown (0xc026)
  21. 200xc00funknown (0xc00f)
  22. 210xc005unknown (0xc005)
  23. 220xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  24. 230xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  25. 240xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  26. 250xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  27. 260xc029unknown (0xc029)
  28. 270xc025unknown (0xc025)
  29. 280xc00eunknown (0xc00e)
  30. 290xc004unknown (0xc004)
  31. 300x006bTLS_DHE_RSA_WITH_AES_256_CBC_SHA256
  32. 310x0069unknown (0x0069)
  33. 320x0068unknown (0x0068)
  34. 330x0039TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  35. 340x0037unknown (0x0037)
  36. 350x0036unknown (0x0036)
  37. 360x0067TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
  38. 370x003funknown (0x003f)
  39. 380x003eunknown (0x003e)
  40. 390x0033TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  41. 400x0031unknown (0x0031)
  42. 410x0030unknown (0x0030)
  43. 420x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  44. 430x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  45. 440x003dTLS_RSA_WITH_AES_256_CBC_SHA256
  46. 450x0035TLS_RSA_WITH_AES_256_CBC_SHA
  47. 460x003cTLS_RSA_WITH_AES_128_CBC_SHA256
  48. 470x002fTLS_RSA_WITH_AES_128_CBC_SHA
  49. 480x00ffTLS_EMPTY_RENEGOTIATION_INFO
extensions(6)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000bec_point_formats
  4. 30x000dsignature_algorithms
  5. 40x000fheartbeat
  6. 50x0010application_layer_protocol_negotiation (ALPN)

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

curves / groups(4)
  1. 00x0017secp256r1 (P-256)
  2. 10x0019secp521r1 (P-521)
  3. 20x0018secp384r1 (P-384)
  4. 30x0016unknown (0x0016)
signature algorithms(15)
  1. 00x0601rsa_pkcs1_sha512
  2. 10x0602ecdsa_secp521r1_sha512
  3. 20x0603ecdsa_secp521r1_sha512
  4. 30x0501rsa_pkcs1_sha384
  5. 40x0502ecdsa_secp384r1_sha384
  6. 50x0503ecdsa_secp384r1_sha384
  7. 60x0401rsa_pkcs1_sha256
  8. 70x0402rsa_pkcs1_sha384
  9. 80x0403ecdsa_secp256r1_sha256
  10. 90x0301rsa_pkcs1_sha256 (legacy)
  11. 100x0302rsa_pkcs1_sha384 (legacy)
  12. 110x0303rsa_pkcs1_sha512 (legacy)
  13. 120x0201rsa_pkcs1_sha1
  14. 130x0202unknown (0x0202)
  15. 140x0203ecdsa_sha1

Reach — domains contacted

Top 5 of 5. Share is the fraction of this fingerprint’s observations reaching each name.