TLS ClientHello (JA4)

q13d0311h3_55b375c5d22e_0e9637bee5d3

first seen 2026-07-21 19:35 · last seen 2026-09-03 06:34 · JSON

Distinct clients per day (last 30 days, peak 3/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

Protocolq (QUIC)
TLS version13
SNId (domain)
Cipher count3
Extension count11
ALPNh3
Ciphers1301, 1302, 1303
Extensions0005, 000a, 000d, 0012, 001b, 002b, 002d, 0033, 0039
Signature algorithms0403, 0804, 0401, 0503, 0203, 0805, 0805, 0501, 0806, 0601, 0201
JA4_rq13d0311h3_1301,1302,1303_0005,000a,000d,0012,001b,002b,002d,0033,0039_0403,0804,0401,0503,0203,0805,0805,0501,0806,0601,0201
JA4_o (sample)q13d0311h3_55b375c5d22e_56c3b4b4be77
JA4_ro (sample)q13d0311h3_1301,1302,1303_0000,000a,0010,0005,000d,0012,0033,002d,002b,0039,001b_0403,0804,0401,0503,0203,0805,0805,0501,0806,0601,0201

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)

fingerprintco-occurrences
ge30nn06zhcn_efcfe334972b_000000000000_0000000000009
ge30nn08enus_6fbeabe70649_000000000000_0000000000002
ge30nr09enus_9ef6621d46ec_000000000000_0000000000002
ge30nn05enus_892e8e8cf56b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2, urlsession 6.3.3, urlsession 6.3.2.The fingerprint page shows the full measured match list. More on the catalog.1
ge30nn08engb_6fbeabe70649_000000000000_0000000000001

QUIC transport params

fingerprintco-occurrences
q07_e80dd4933807 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, urlsession 6.3.3, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.15

User-Agent

fingerprintco-occurrences
Good7
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0 Safari/605.1.152
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/21G80 Safari/604.12
BetaNewApp/0 CFNetwork/1390 Darwin/22.0.02
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.0.1 Safari/605.1.151

Country

fingerprintco-occurrences
CN · China7
US · United States3
SG · Singapore2
BD · Bangladesh2
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS4812 · China Telecom (Group)7
AS19165 · Webpass Inc.3
AS63969 · Race Online Limited2
AS141389 · GOIP Telecom (Asia Pacific) Pte. Ltd.2
AS394089 · Google LLC1

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprintlinked observations
t13d2014h2_a09f3c656075_14788d8d241b2