JA4 t13d130900_be732f438736_4c1ab0552904

t13d130900_be732f438736_4c1ab0552904

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

13

Extensions offered

9

ALPN

none offered

Same tool, different options

These 7 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.

• t13d160900_693fa8a1e7ee_4c1ab0552904
• t13d0810h2_8c0f8794f857_4c1ab0552904
• t13d100900_561a47a994ce_4c1ab0552904
• t13d1010h2_561a47a994ce_4c1ab0552904
• t13d140900_f98f5dc5c741_4c1ab0552904
• t13d1410h2_f98f5dc5c741_4c1ab0552904
• t13d1610h2_926abbf9e651_4c1ab0552904

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 13

• TLS_AES_256_GCM_SHA384
• TLS_AES_128_GCM_SHA256
• TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
• TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
• TLS_RSA_WITH_AES_256_GCM_SHA384
• TLS_RSA_WITH_AES_128_GCM_SHA256
• TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_EMPTY_RENEGOTIATION_INFO_SCSV

Extensions 9

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

Named groups 3

• secp256r1
• secp384r1
• x25519

Point formats 3

• uncompressed
• ansiX962_compressed_prime
• ansiX962_compressed_char2

771,4866-4865-49196-49200-49195-49199-157-156-49172-49171-53-47-255,0-11-10-23-13-43-45-51-21,23-24-29,0-1-2

Seen in live traffic

Connections

2

First seen

2026-09-18 10:26 UTC

Last seen

2026-09-18 10:26 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.