JA4 t12d1609h2_5d6ef2d43e1b_e775d189a6c1

t12d1609h2_5d6ef2d43e1b_e775d189a6c1

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 1.2

Server name

server name sent

Cipher suites offered

16

Extensions offered

9

ALPN

h2

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 16

• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA

Extensions 9

• extended_master_secret
• session_ticket
• application_layer_protocol_negotiation
• signed_certificate_timestamp
• server_name
• ec_point_formats
• supported_groups
• padding
• signature_algorithms

Named groups 3

• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,49200-49199-156-49191-52392-52393-49187-157-60-49159-49170-49169-49162-47-49171-49172,23-35-16-18-0-11-10-21-13,29-23-24,0

Seen in live traffic

Connections

1

First seen

2026-10-28 11:48 UTC

Last seen

2026-10-28 11:48 UTC

Transport

TCP

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.