TCP SYN (JA4T)

29184_2-4-8-1-3_1363_7

first seen 2026-10-23 21:38 · last seen 2026-10-23 22:43 · JSON

Distinct clients per day (last 30 days, peak 495/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

TCP window29184
Option kinds2-4-8-1-3
MSS1363
Window scale7

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.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d3013h2_1d37bd780c83_8537cf56674e506

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_bf75ddd0bb29_000000000000_000000000000506

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.506

TCP SYN (p0f)

fingerprintco-occurrences
4:116+12:0:1363:29184,7:mss,sok,ts,nop,ws::0112
4:115+13:0:1363:29184,7:mss,sok,ts,nop,ws::095
4:111+17:0:1363:29184,7:mss,sok,ts,nop,ws::056
4:114+14:0:1363:29184,7:mss,sok,ts,nop,ws::045
4:110+18:0:1363:29184,7:mss,sok,ts,nop,ws::044
4:113+15:0:1363:29184,7:mss,sok,ts,nop,ws::029
4:109+19:0:1363:29184,7:mss,sok,ts,nop,ws::020
4:107+21:0:1363:29184,7:mss,sok,ts,nop,ws::020
4:117+11:0:1363:29184,7:mss,sok,ts,nop,ws::019
4:112+16:0:1363:29184,7:mss,sok,ts,nop,ws::016

User-Agent

fingerprintco-occurrences
curl/8.14.1506

Country

fingerprintco-occurrences
KR · South Korea204
JP · Japan175
US · United States21
RU · Russia20
CA · Canada9
FR · France8
TH · Thailand6
BR · Brazil5
GB · United Kingdom5
MX · Mexico5

Network (ASN)

fingerprintco-occurrences
AS4766 · Korea Telecom138
AS17676 · SoftBank Corp.41
AS2516 · KDDI CORPORATION35
AS9318 · SK Broadband Co Ltd25
AS4713 · NTT DOCOMO BUSINESS,Inc.19
AS17858 · LG POWERCOMM16
AS12389 · PJSC Rostelecom12
AS9824 · JCOM Co., Ltd.12
AS2527 · Sony Network Communications Inc.10
AS18126 · Chubu Telecommunications Company, Inc.9

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.506