JA4 t12d320800_b415a99ff5d8_3ebdebe9c84d

t12d320800_b415a99ff5d8_3ebdebe9c84d

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

32

Extensions offered

8

ALPN

none offered

Same tool, different options

These 2 other fingerprints share this one's JA4_c — the extension and signature-algorithm hash. A client that keeps its extension set constant while varying its cipher list produces exactly this pattern, which is what a scanner iterating cipher suites looks like. A JA3 cannot show you this: its single MD5 collapses ciphers and extensions together, so every variation looks like an unrelated client.

• t12d520800_9e42dd384d95_3ebdebe9c84d
• t12d640800_60fcec5a41cb_3ebdebe9c84d

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 32

• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• 163 (0x00a3)
• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_DHE_RSA_WITH_AES_256_CCM
• TLS_RSA_WITH_AES_256_CCM
• 49245 (0xc05d)
• 49239 (0xc057)
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• 162 (0x00a2)
• TLS_DHE_RSA_WITH_AES_128_CCM
• TLS_RSA_WITH_AES_128_CCM
• 49244 (0xc05c)
• 49238 (0xc056)
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
• 106 (0x006a)
• TLS_ECDHE_RSA_WITH_CAMELLIA_256_CBC_SHA384
• 195 (0x00c3)
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
• 64 (0x0040)
• TLS_ECDHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
• 189 (0x00bd)
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• 56 (0x0038)
• 135 (0x0087)
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• 50 (0x0032)
• 153 (0x0099)
• 68 (0x0044)
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
• 19 (0x0013)
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 8

• server_name
• ec_point_formats
• supported_groups
• session_ticket
• status_request
• encrypt_then_mac
• extended_master_secret
• signature_algorithms

Named groups 5

• x25519
• secp256r1
• x448
• secp521r1
• secp384r1

Point formats 3

• uncompressed
• ansiX962_compressed_prime
• ansiX962_compressed_char2

771,49196-163-52393-49327-49325-49245-49239-49195-162-49326-49324-49244-49238-49188-106-49267-195-49187-64-49266-189-49162-56-135-49161-50-153-68-49159-49160-19-255,0-11-10-35-5-22-23-13,29-23-30-25-24,0-1-2

Seen in live traffic

Connections

1

First seen

2026-10-06 20:46 UTC

Last seen

2026-10-06 20:46 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.