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unrecognised fingerprint

t00d0311h2_55b375c5d22e_8741eb3d41f6

Unclassified

Too few observations to classify this stack — a handful of connections can't tell a permuting client from coincidence.

unknownALPN h2 · h2-fb · http/1.12026-07-20 → 2026-07-20
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
unclassified — only 1 observation(s) — too few to tell a permuting client from a coincidence.
reach
0.000effectively one destination.

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

1
observations
1
domains reached
2026-07-20
first seen
2026-07-20
last seen

ClientHello anatomy

The underscore groups of JA4_r are the raw cipher suites · extensions · signature algorithms behind the hash.

TLS version
unknown
ALPN (wire order)
h2, h2-fb, http/1.1
EC point formats
—
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(3)
  1. 00x1301TLS_AES_128_GCM_SHA256
  2. 10x1302TLS_AES_256_GCM_SHA384
  3. 20x1303TLS_CHACHA20_POLY1305_SHA256
extensions(11)sorted
  1. 00x0000server_name (SNI)
  2. 10x000asupported_groups
  3. 20x000dsignature_algorithms
  4. 30x0010application_layer_protocol_negotiation (ALPN)
  5. 40x001bcompress_certificate
  6. 50x0029unknown (0x0029)
  7. 60x002bsupported_versions
  8. 70x002dpsk_key_exchange_modes
  9. 80x0033key_share
  10. 90xfe0dencrypted_client_hello
  11. 100xff04unknown (0xff04)

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

curves / groups(3)
  1. 00x11ecX25519MLKEM768 PQ
  2. 10x001dx25519
  3. 20x0017secp256r1 (P-256)
signature algorithms(4)
  1. 00x0403ecdsa_secp256r1_sha256
  2. 10x0503ecdsa_secp384r1_sha384
  3. 20x0603ecdsa_secp521r1_sha512
  4. 30x0804rsa_pss_rsae_sha256

Reach — domains contacted

Top 1 of 1. Share is the fraction of this fingerprint’s observations reaching each name.