JA4 t12d620500_f293919562b9_654fe63324b3

t12d620500_f293919562b9_654fe63324b3

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

62

Extensions offered

5

ALPN

none offered

Same tool, different options

These 1 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.

• t12d380500_10ed599f3404_654fe63324b3

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 62

• TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA
• 65413 (0xff85)
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA256
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
• 129 (0x0081)
• 49177 (0xc019)
• 167 (0x00a7)
• 109 (0x006d)
• 58 (0x003a)
• 197 (0x00c5)
• 137 (0x0089)
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA256
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
• 49176 (0xc018)
• 166 (0x00a6)
• 108 (0x006c)
• 52 (0x0034)
• 191 (0x00bf)
• 70 (0x0046)
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA256
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• 49174 (0xc016)
• 24 (0x0018)
• TLS_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_RC4_128_MD5
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
• TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
• 49175 (0xc017)
• 27 (0x001b)
• TLS_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 5

• server_name
• ec_point_formats
• supported_groups
• session_ticket
• signature_algorithms

Named groups 3

• x25519
• secp256r1
• secp384r1

Point formats 1

• uncompressed

771,52393-52392-52394-49200-49196-49192-49188-49172-49162-159-107-57-65413-196-136-129-49177-167-109-58-197-137-157-61-53-192-132-49199-49195-49191-49187-49171-49161-158-103-51-190-69-49176-166-108-52-191-70-156-60-47-186-65-49169-49159-49174-24-5-4-49170-49160-22-49175-27-10-255,0-11-10-35-13,29-23-24,0

Seen in live traffic

Connections

8

First seen

2026-10-01 12:48 UTC

Last seen

2026-10-01 12:48 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.