JA4 t12d520800_9e42dd384d95_3ebdebe9c84d

t12d520800_9e42dd384d95_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

52

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.

• t12d320800_b415a99ff5d8_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 52

• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_ARIA_256_GCM_SHA384
• TLS_RSA_WITH_ARIA_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_CAMELLIA_256_CBC_SHA384
• 49235 (0xc053)
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_ARIA_128_GCM_SHA256
• TLS_RSA_WITH_ARIA_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_CAMELLIA_128_CBC_SHA256
• 49234 (0xc052)
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_256_GCM_SHA384
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_128_GCM_SHA256
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_SEED_CBC_SHA
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_ARIA_256_GCM_SHA384
• TLS_DHE_RSA_WITH_ARIA_256_GCM_SHA384
• 49233 (0xc051)
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_ARIA_128_GCM_SHA256
• TLS_DHE_RSA_WITH_ARIA_128_GCM_SHA256
• 49232 (0xc050)
• TLS_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_SEED_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
• TLS_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_3DES_EDE_CBC_SHA
• 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

771,49200-159-52392-52394-49315-49311-49249-49235-49199-158-49314-49310-49248-49234-49192-107-49271-196-49191-103-49270-190-49172-57-136-49171-51-154-69-49169-49170-22-157-49313-49309-49233-156-49312-49308-49232-61-192-60-186-53-132-47-150-65-5-10-255,0-11-10-35-5-22-23-13,29-23-30-25-24,0-1-2

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.