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

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

Named groups 4

• SecP256r1MLKEM768
• x25519
• secp256r1
• secp384r1

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

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.

• 4260be7988555bc770f47aa240236703
• 7b8ed83075e8b5f380e5c16c92e5dbca
• 07dc69df1aca97916a1beaa6dbf5bc57
• d7d14766f1351580878cde121b24dcee
• d3c4487c5ef78fe80c064650e2fcfe1e
• 551e161da363dfb1f58b1bf58819f4a0
• 8b87e7d0dfc44a0202da2c9f0aed1db9
• 4fe65cc423a82406a01f4e326e55c165
• 4f0ed9beedff21a24a0a9e470096421b
• e94ca39dd51c4992fb8e3dcb49cf40af
• ad90a5fa37762e1f77ec16e8745d5349
• f4499811a97190873f9fd3433ed92a87
• … 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 (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 (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 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/155.0.0.0 Safari/537.36 3×
• 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 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.7680.1242 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.