JA4 t13d0911h1_f91f431d341e_c8ddf72c3365

t13d0911h1_f91f431d341e_c8ddf72c3365

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

11

ALPN

h1

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_AES_128_GCM_SHA256
• TLS_CHACHA20_POLY1305_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 11

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

Named groups 4

• SecP256r1MLKEM768
• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,4866-4865-4867-49196-49195-52393-49200-49199-52392,45-16-51-23-10-11-5-43-13-0-65037,4588-29-23-24,0

Seen in live traffic

Connections

8

First seen

2026-10-15 01:51 UTC

Last seen

2026-10-15 03:38 UTC

Transport

TCP

JA3 hashes absorbed

8

The same client, 8 different JA3s

This one JA4 covers 8 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 8 unrelated clients. JA4 sorts those lists before hashing, which is why all of it lands here instead.

• ddbad6c5e430e91fe2312e40e72049fb
• 8966061e1c71bf88056ce7a8e07b7187
• a6f87c6e9dada920cc45c9503b01894b
• 28729d7b5f592af22b15effac1cba202
• c01eb9b264e17081eece106c4f59bc66
• 4b6ab05ed0b32e1685b541c046e8d3da
• fded16cae52e448c8da23daeb42fa55d
• 24ed176b4ae90f85f9f7afaf699d21aa

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.