JA4 Fingerprint Directory

t10d420300_4a5d165148b5_6bf8f498b543

Legacy TLS client — inferred from the JA4 handshake shape.

What this fingerprint encodes

Transport

TCP

TLS version

TLS 1.0

Server name

server name sent

Cipher suites offered

42

Extensions offered

3

ALPN

none offered

Same tool, different options

These 13 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.

• t10d640300_13a2a23d501b_6bf8f498b543
• t10d640300_67f0ca237a44_6bf8f498b543
• t10d640300_a3acda31d846_6bf8f498b543
• t10d640300_e31a90cd0803_6bf8f498b543
• t10d640300_e7b476f9520b_6bf8f498b543
• t10d640300_f559eb9565fd_6bf8f498b543
• t11d640300_13a2a23d501b_6bf8f498b543
• t11d640300_67f0ca237a44_6bf8f498b543
• t11d640300_a3acda31d846_6bf8f498b543
• t11d640300_e31a90cd0803_6bf8f498b543
• t11d640300_e7b476f9520b_6bf8f498b543
• t11d640300_f559eb9565fd_6bf8f498b543
• t11d420300_4a5d165148b5_6bf8f498b543

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 42

• TLS_RSA_WITH_RC4_128_MD5
• TLS_RSA_WITH_RC4_128_SHA
• TLS_RSA_WITH_3DES_EDE_CBC_SHA
• 13 (0x000d)
• 16 (0x0010)
• 19 (0x0013)
• TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• 48 (0x0030)
• 49 (0x0031)
• 50 (0x0032)
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA
• 54 (0x0036)
• 55 (0x0037)
• 56 (0x0038)
• TLS_DHE_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_CAMELLIA_128_CBC_SHA
• 68 (0x0044)
• TLS_DHE_RSA_WITH_CAMELLIA_128_CBC_SHA
• 102 (0x0066)
• TLS_RSA_WITH_CAMELLIA_256_CBC_SHA
• 135 (0x0087)
• TLS_DHE_RSA_WITH_CAMELLIA_256_CBC_SHA
• TLS_RSA_WITH_SEED_CBC_SHA
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV
• 49154 (0xc002)
• 49155 (0xc003)
• 49156 (0xc004)
• 49157 (0xc005)
• TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
• TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
• 49164 (0xc00c)
• 49165 (0xc00d)
• 49166 (0xc00e)
• 49167 (0xc00f)
• TLS_ECDHE_RSA_WITH_RC4_128_SHA
• TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA

Extensions 3

• server_name
• ec_point_formats
• supported_groups

Named groups 26

• 14 (0x000e)
• 13 (0x000d)
• secp521r1
• 11 (0x000b)
• 12 (0x000c)
• secp384r1
• 9 (0x0009)
• 10 (0x000a)
• 22 (0x0016)
• secp256r1
• 8 (0x0008)
• 6 (0x0006)
• 7 (0x0007)
• 20 (0x0014)
• 21 (0x0015)
• 4 (0x0004)
• 5 (0x0005)
• 18 (0x0012)
• 19 (0x0013)
• 1 (0x0001)
• 2 (0x0002)
• 3 (0x0003)
• 15 (0x000f)
• 16 (0x0010)
• 17 (0x0011)
• x25519

Point formats 1

• uncompressed

769,4-5-10-13-16-19-22-47-48-49-50-51-53-54-55-56-57-65-68-69-102-132-135-136-150-255-49154-49155-49156-49157-49159-49160-49161-49162-49164-49165-49166-49167-49169-49170-49171-49172,0-11-10,14-13-25-11-12-24-9-10-22-23-8-6-7-20-21-4-5-18-19-1-2-3-15-16-17-29,0

Seen in live traffic

Connections

1

First seen

2026-08-23 18:31 UTC

Last seen

2026-08-23 18:31 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.