JA4 q13d0115h3_58070c528ac8_c935d23fa9a4

q13d0115h3_58070c528ac8_c935d23fa9a4

Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

What this fingerprint encodes

Transport

QUIC

TLS version

TLS 1.3

Server name

server name sent

Cipher suites offered

1

Extensions offered

15

ALPN

h3

Same tool, different options

These 5 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.

• q13d0115h3_0f2cb44170f4_c935d23fa9a4
• q13d0115h3_ee47968ec53b_c935d23fa9a4
• q13d0215h3_62ed6f6ca7ad_c935d23fa9a4
• q13d0215h3_fffbd61365f3_c935d23fa9a4
• q13d0315h3_55b375c5d22e_c935d23fa9a4

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 1

• TLS_CHACHA20_POLY1305_SHA256

Extensions 15

• signed_certificate_timestamp
• application_layer_protocol_negotiation
• supported_versions
• supported_groups
• session_ticket
• status_request
• ec_point_formats
• key_share
• psk_key_exchange_modes
• quic_transport_parameters
• extended_master_secret
• signature_algorithms_cert
• renegotiation_info
• server_name
• signature_algorithms

Named groups 4

• secp521r1
• secp256r1
• x25519
• secp384r1

Point formats 1

• uncompressed

771,4867,18-16-43-10-35-5-11-51-45-57-23-50-65281-0-13,25-23-29-24,0

Seen in live traffic

Connections

1

First seen

2026-11-06 06:28 UTC

Last seen

2026-11-06 06:28 UTC

Transport

QUIC

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.