JA4 t13d070900_72bbeb4dfc47_d08fc002a886

t13d070900_72bbeb4dfc47_d08fc002a886

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 1.3

Server name

server name sent

Cipher suites offered

7

Extensions offered

9

ALPN

none offered

Same tool, different options

These 3 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.

• t13d020900_fffbd61365f3_d08fc002a886
• t13d080900_42230c8c7b22_d08fc002a886
• t13d090900_778603501f98_d08fc002a886

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 7

• TLS_AES_128_GCM_SHA256
• TLS_AES_128_CCM_SHA256
• TLS_AES_128_CCM_8_SHA256
• 49332 (0xc0b4)
• 49333 (0xc0b5)
• 198 (0x00c6)
• 199 (0x00c7)

Extensions 9

• server_name
• supported_groups
• ec_point_formats
• signature_algorithms
• signed_certificate_timestamp
• supported_versions
• psk_key_exchange_modes
• key_share
• padding

Named groups 30

• 514 (0x0202)
• 4589 (0x11ed)
• SecP256r1MLKEM768
• X25519MLKEM768
• 513 (0x0201)
• SecP384r1MLKEM1024
• 4585 (0x11e9)
• 4586 (0x11ea)
• 4590 (0x11ee)
• X25519Kyber768Draft00
• 25498 (0x639a)
• secp384r1
• secp256r1
• secp521r1
• x25519
• x448
• 26 (0x001a)
• 27 (0x001b)
• 28 (0x001c)
• 31 (0x001f)
• 32 (0x0020)
• 33 (0x0021)
• 22 (0x0016)
• 21 (0x0015)
• 41 (0x0029)
• ffdhe2048
• ffdhe3072
• ffdhe4096
• 259 (0x0103)
• 260 (0x0104)

Point formats 1

• uncompressed

771,4865-4868-4869-49332-49333-198-199,0-10-11-13-18-43-45-51-21,514-4589-4588-4587-513-512-4585-4586-4590-25497-25498-24-23-25-29-30-26-27-28-31-32-33-22-21-41-256-257-258-259-260,0

Seen in live traffic

Connections

3

First seen

2026-10-11 18:20 UTC

Last seen

2026-10-11 18:24 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.