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unrecognised fingerprint

t13d201100_2b729b4bf6f3_533b6d20482b

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 1.3no ALPN2026-07-22 → 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
0.692 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

83
observations
4
domains reached
2026-07-22
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)
—
EC point formats
—
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(20)
  1. 00x1302TLS_AES_256_GCM_SHA384
  2. 10x1301TLS_AES_128_GCM_SHA256
  3. 20xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  4. 30xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  5. 40xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  6. 50xc02fTLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
  7. 60xc024TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
  8. 70xc023TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
  9. 80xc028TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
  10. 90xc027TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
  11. 100xc00aTLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  12. 110xc009TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
  13. 120xc014TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
  14. 130xc013TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
  15. 140x009dTLS_RSA_WITH_AES_256_GCM_SHA384
  16. 150x009cTLS_RSA_WITH_AES_128_GCM_SHA256
  17. 160x003dTLS_RSA_WITH_AES_256_CBC_SHA256
  18. 170x003cTLS_RSA_WITH_AES_128_CBC_SHA256
  19. 180x0035TLS_RSA_WITH_AES_256_CBC_SHA
  20. 190x002fTLS_RSA_WITH_AES_128_CBC_SHA
extensions(11)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000dsignature_algorithms
  4. 30x0017extended_master_secret
  5. 40x0023session_ticket
  6. 50x0029unknown (0x0029)
  7. 60x002bsupported_versions
  8. 70x002dpsk_key_exchange_modes
  9. 80x0031post_handshake_auth
  10. 90x0033key_share
  11. 100xff01renegotiation_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(12)
  1. 00x0804rsa_pss_rsae_sha256
  2. 10x0805rsa_pss_rsae_sha384
  3. 20x0806rsa_pss_rsae_sha512
  4. 30x0401rsa_pkcs1_sha256
  5. 40x0501rsa_pkcs1_sha384
  6. 50x0201rsa_pkcs1_sha1
  7. 60x0403ecdsa_secp256r1_sha256
  8. 70x0503ecdsa_secp384r1_sha384
  9. 80x0203ecdsa_sha1
  10. 90x0202unknown (0x0202)
  11. 100x0601rsa_pkcs1_sha512
  12. 110x0603ecdsa_secp521r1_sha512

Reach — domains contacted

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