JA4 t12i2015h2_c55ce1e16a28_48d017660cef

t12i2015h2_c55ce1e16a28_48d017660cef

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

no server name (IP literal)

Cipher suites offered

20

Extensions offered

15

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 20

• TLS_AES_128_GCM_SHA256
• TLS_AES_256_GCM_SHA384
• TLS_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA
• 49408 (0xc100)
• 49409 (0xc101)
• 49410 (0xc102)
• 65413 (0xff85)
• 129 (0x0081)

Extensions 15

• extended_master_secret
• renegotiation_info
• supported_groups
• ec_point_formats
• session_ticket
• application_layer_protocol_negotiation
• status_request
• signature_algorithms
• signed_certificate_timestamp
• key_share
• psk_key_exchange_modes
• supported_versions
• compress_certificate
• application_settings
• padding

Named groups 3

• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,4865-4866-4867-49195-49199-49196-49200-52393-52392-49171-49172-156-157-47-53-49408-49409-49410-65413-129,23-65281-10-11-35-16-5-13-18-51-45-43-27-17513-21,29-23-24,0

Seen in live traffic

Connections

1

First seen

2026-09-01 09:58 UTC

Last seen

2026-09-01 09:58 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.