JA4 q13d0311h3_55b375c5d22e_512ac2397e4d

q13d0311h3_55b375c5d22e_512ac2397e4d

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

What this fingerprint encodes

Transport

QUIC

TLS version

TLS 1.3

Server name

server name sent

Cipher suites offered

3

Extensions offered

11

ALPN

h3

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 3

• TLS_AES_256_GCM_SHA384
• TLS_AES_128_GCM_SHA256
• TLS_CHACHA20_POLY1305_SHA256

Extensions 11

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

Named groups 4

• SecP256r1MLKEM768
• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,4866-4865-4867,43-45-51-5-16-10-57-13-23-0-11,4588-29-23-24,0

Seen in live traffic

Connections

4

First seen

2026-09-14 18:12 UTC

Last seen

2026-09-14 18:12 UTC

Transport

QUIC

JA3 hashes absorbed

4

The same client, 4 different JA3s

This one JA4 covers 4 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 4 unrelated clients. JA4 sorts those lists before hashing, which is why all of it lands here instead.

• 02cc4cf10938f7cbd351ca53ed7feb08
• 502bf5b39d2cf14bf0b3fa8a9d23d5a2
• 41cef7a8978b8e28193858ca3bd9ca11
• 681b907e6c9604225330e665c113666a

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.