JA4 t12d2306h2_a58ecfb8dcb5_c58f62271fca

t12d2306h2_a58ecfb8dcb5_c58f62271fca

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

23

Extensions offered

6

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 23

• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_RC4_128_MD5
• TLS_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA256
• 9 (0x0009)
• 8 (0x0008)
• 3 (0x0003)
• 1 (0x0001)
• 2 (0x0002)
• 59 (0x003b)

Extensions 6

• server_name
• supported_groups
• ec_point_formats
• signature_algorithms
• application_layer_protocol_negotiation
• renegotiation_info

Named groups 4

• x25519
• secp256r1
• secp384r1
• secp521r1

Point formats 1

• uncompressed

771,49195-49196-49199-49200-52392-52393-156-157-4-5-49169-10-49170-22-47-53-60-9-8-3-1-2-59,0-10-11-13-16-65281,29-23-24-25,0

Seen in live traffic

Connections

1

First seen

2026-10-23 14:59 UTC

Last seen

2026-10-23 14:59 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.