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unrecognised fingerprint

t13d1314h2_f57a46bbacb6_e42f34c56612

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 1.3ALPN h2 · http/1.12026-07-19 → 2026-07-23
JA4
JA4_r
JA3
JA3_raw

this JA3 also appears under:

One JA3 mapping to several JA4s means the same cipher/extension set arrived under different TLS versions or ALPNs — the JA4 is the finer identity.

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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 716 connections: a deterministic stack. Libraries and command-line clients look like this.
reach
0.843 roams across 87 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

716
observations
87
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
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(13)
  1. 00x1301TLS_AES_128_GCM_SHA256
  2. 10x1302TLS_AES_256_GCM_SHA384
  3. 20x1303TLS_CHACHA20_POLY1305_SHA256
  4. 30xc02cTLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
  5. 40xc02bTLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
  6. 50xcca9TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
  7. 60xc030TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
  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(14)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. 70x0015padding
  9. 80x0017extended_master_secret
  10. 90x001bcompress_certificate
  11. 100x002bsupported_versions
  12. 110x002dpsk_key_exchange_modes
  13. 120x0033key_share
  14. 130xff01renegotiation_info

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

curves / groups(4)
  1. 00x001dx25519
  2. 10x0017secp256r1 (P-256)
  3. 20x0018secp384r1 (P-384)
  4. 30x0019secp521r1 (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

Reach — domains contacted

Top 15 of 87. Share is the fraction of this fingerprint’s observations reaching each name.