JA4 Fingerprint Directory

t00d110500_3790f16dbcf6_5551bc6d1e9a

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

TCP

TLS version

unknown (00)

Server name

server name sent

Cipher suites offered

11

Extensions offered

5

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.

• t10d210500_1e0f66cc3f83_5551bc6d1e9a
• t11d210500_1e0f66cc3f83_5551bc6d1e9a

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 1.0

Cipher suites 11

• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_RSA_WITH_3DES_EDE_CBC_SHA

Extensions 5

• server_name
• status_request
• supported_groups
• ec_point_formats
• renegotiation_info

Named groups 3

• secp256r1
• secp384r1
• secp521r1

Point formats 1

• uncompressed

769,49169-49159-49171-49161-49172-49162-5-47-53-49170-10,0-5-10-11-65281,23-24-25,0

Seen in live traffic

Connections

1

First seen

2026-08-23 14:25 UTC

Last seen

2026-08-23 14:25 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.