JA4 q13d0313h3_55b375c5d22e_bc972749234a

q13d0313h3_55b375c5d22e_bc972749234a

Chrome — inferred from the User-Agent on its requests.

What this fingerprint encodes

Transport

QUIC

TLS version

TLS 1.3

Server name

server name sent

Cipher suites offered

3

Extensions offered

13

ALPN

h3

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 3

• TLS_AES_128_GCM_SHA256
• TLS_AES_256_GCM_SHA384
• TLS_CHACHA20_POLY1305_SHA256

Extensions 13

• server_name
• 17613 (0x44cd)
• signature_algorithms
• encrypted_client_hello
• 4832 (0x12e0)
• supported_versions
• key_share
• application_layer_protocol_negotiation
• 51764 (0xca34)
• supported_groups
• quic_transport_parameters
• psk_key_exchange_modes
• compress_certificate

Named groups 4

• SecP256r1MLKEM768
• x25519
• secp256r1
• secp384r1

771,4865-4866-4867,0-17613-13-65037-4832-43-51-16-51764-10-57-45-27,4588-29-23-24,

Seen in live traffic

Connections

77

First seen

2026-09-03 14:21 UTC

Last seen

2026-10-09 11:21 UTC

Transport

QUIC

JA3 hashes absorbed

77

The same client, 77 different JA3s

This one JA4 covers 77 distinct JA3 hashes. A JA3 hashes the cipher and extension lists in the order they arrived, so a client that shuffles them — which Chrome and its derivatives do on purpose — produces a new JA3 almost every connection and fragments into what looks like 77 unrelated clients. JA4 sorts those lists before hashing, which is why all of it lands here instead.

• 0fd8f4d41e552aef01646805246214ed
• 957366c735707a4257ed017dcacc550a
• 37a30ff01c36d3cb46daebeb77c9ff26
• e8cae3c5acf6f4d6f4024d50bfb07b14
• 20821c3a1071744ed9e7e36794f87934
• afa72ac574decd9ecee944237c84d10d
• 9753f780fb554a7fbe0964d83703c41d
• 29bf8717cc9e10ab16970d70977439c7
• 17bdca27cad01ce397fbfcae0ce732b1
• cf70726dfe0a7501e25246f1e5c99141
• 1e5f3e182d305b47ddf4769649b457f4
• 6a6ca125b25dec1b198117f918f29bed
• … and 65 more

User-Agents seen on this fingerprint

• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36 169×
• Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Mobile Safari/537.36 158×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/109.0 130×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.36 104×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.36 93×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36 89×
• Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Mobile Safari/537.36 80×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36 48×
• Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Mobile Safari/537.36 46×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/157.0.0.0 Safari/537.36 43×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2159.1780 Safari/537.36 24×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/151.0.0.0 Safari/537.36 11×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0 9×
• Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.7129.1365 Safari/537.36 9×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/155.0.0.0 Safari/537.36 3×
• Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.7680.1242 Safari/537.36 2×
• Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 2×
• Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/153.0.0.0 Safari/537.36 1×

A User-Agent is self-declared and trivially forged, so this names an observation rather than proving an identity. It is still the strongest signal available: the fingerprint comes off the TLS handshake and the User-Agent off the request that followed, and one client build keeping a stable JA4 while changing what it calls itself is a finding in its own right.

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.