TLS ClientHello (JA4)

q13d0312h3_55b375c5d22e_c183556c78e2

first seen 2026-06-17 11:14 · last seen 2026-10-22 14:07 · JSON

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

q13d0312h3_55b375c5d22e_c183556c78e2

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleW…

User-Agent claims Chrome 149.0.0.0

TLS extensions or signature algorithms differ from every measured Chrome capture

The cipher suites match Chrome, but the extension set or signature algorithms differ from every capture even after normalizing handshake-variant extensions. Most likely a field-trial, ECH, or build variant the catalog has not captured; occasionally mimicry. This sharpens as catalog coverage grows.

Full User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36
Claimed version	149.0.0.0
Measured versions	149.0.7827.103, 149.0.7827.53, 149.0.7827.115, 153.0.8010.47, 149.0.7827.54, 155.0.8059.79, 153.0.8010.36, 151.0.7922.170, 156.0.8078.48, 152.0.7977.82, 152.0.7977.65, 156.0.8078.73, 155.0.8059.84, 150.0.7871.129, 155.0.8059.40, 154.0.8037.58, 151.0.7922.173, 149.0.7827.156, 151.0.7922.71, 150.0.7871.128, 154.0.8037.97, 149.0.7827.155, 151.0.7922.109, 152.0.7977.64, 149.0.7827.200, 151.0.7922.174, 153.0.8010.53, 149.0.7827.114, 154.0.8037.57, 149.0.7827.201, 150.0.7871.187, 152.0.7977.83, 153.0.8010.52, 150.0.7871.114, 155.0.8059.39, 150.0.7871.115, 151.0.7922.72, 151.0.7922.137, 152.0.7977.75, 154.0.8037.92, 156.0.8078.47, 149.0.7827.102, 151.0.7922.108, 150.0.7871.125, 150.0.7871.46, 148.0.7778.179
Layer	cipher suites match; extension set or signature algorithms differ
JA4 label	unlabeled

low

2026-06-19

Distinct clients per day (last 30 days, peak 2/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

Protocol	`q (QUIC)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`3`
Extension count	`12`
ALPN	`h3`
Ciphers	`1301, 1302, 1303`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 002b, 0033, 0039, ff01`
Signature algorithms	`0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203`
JA4_r	`q13d0312h3_1301,1302,1303_0005,000a,000b,000d,0012,0017,002b,0033,0039,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`
JA4_o (sample)	`q13d0312h3_55b375c5d22e_a14eafd99aa9`
JA4_ro (sample)	`q13d0312h3_1301,1302,1303_0000,0005,000a,000b,000d,ff01,0017,0010,0012,002b,0033,0039_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203`

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

HTTP request (JA4H)

fingerprint	co-occurrences
`ge30nr030000_2601ed496936_000000000000_000000000000`	37
`ge30nr040000_56db3665e6ca_000000000000_000000000000`	1
`ge30nn16zhcn_08b1186d9f18_000000000000_000000000000`	1

QUIC transport params

fingerprint	co-occurrences
`q12_67a81e69c992`	37
`q13_dd847bf90808`	1
`q13_8be8c5b625b2`	1

User-Agent

fingerprint	co-occurrences
`quic-go HTTP/3`	38
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`US` · United States	13
`DE` · Germany	7
`JP` · Japan	5
`GB` · United Kingdom	5
`SG` · Singapore	4
`AE` · United Arab Emirates	4
`CN` · China	1

Network (ASN)

fingerprint	co-occurrences
`AS45102` · Alibaba (US) Technology Co., Ltd.	38
`AS4134` · CHINANET BACKBONE	1

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.	4