JA4 t13d090900_f91f431d341e_543460421724

t13d090900_f91f431d341e_543460421724

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.3

Server name

server name sent

Cipher suites offered

9

Extensions offered

9

ALPN

none offered

The hello it was computed from

Recovered because the proxy now stores the pre-hash JA3 string alongside the digest. Every number below came out of this client's ClientHello; anything we cannot name in the IANA registry is shown as its raw value rather than guessed at.

Version

TLS 1.2

Cipher suites 9

• TLS_AES_256_GCM_SHA384
• TLS_CHACHA20_POLY1305_SHA256
• TLS_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256

Extensions 9

• server_name
• status_request
• ec_point_formats
• psk_key_exchange_modes
• extended_master_secret
• signature_algorithms
• supported_groups
• supported_versions
• key_share

Named groups 3

• SecP256r1MLKEM768
• secp384r1
• secp256r1

Point formats 1

• uncompressed

771,4866-4867-4865-49196-49195-52393-49200-49199-52392,0-5-11-45-23-13-10-43-51,4588-24-23,0

Seen in live traffic

Connections

7

First seen

2026-08-22 23:50 UTC

Last seen

2026-08-26 01:14 UTC

Transport

TCP

JA3 hashes absorbed

7

The same client, 7 different JA3s

This one JA4 covers 7 distinct JA3 hashes. A JA3 hashes the cipher and extension lists in the order they arrived, so a client that shuffles them — which Chrome and its derivatives do on purpose — produces a new JA3 almost every connection and fragments into what looks like 7 unrelated clients. JA4 sorts those lists before hashing, which is why all of it lands here instead.

• c252ab3a4049b0c94b3e50742c4a37f7
• c5782ea1fa1703158e55cd3ae27c03a3
• 9acd80879b7a4505e943e9aa95377e3b
• 9cb3a752e5cb3b838af5add219e80cf4
• 1631124a498f7d30ac0fc27c763103ed
• d89a03ab1bddc82a0d93ada613b3a7d5
• a402348797ee12daa853989ca097052f

This entry is an observation, not a policy decision. It is here because the edge saw it, not because anyone reviewed it, and it blocks nothing on its own. Only the curated tier drives classification and banning.