TCP SYN (JA4T)

29184_2-4-8-1-3_1329_7

first seen 2026-10-23 21:45 · last seen 2026-10-23 22:44 · JSON

Distinct clients per day (last 30 days, peak 79/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
MSS1329
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_8537cf56674e80

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_bf75ddd0bb29_000000000000_00000000000080

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.80

TCP SYN (p0f)

fingerprintco-occurrences
4:106+22:0:1329:29184,7:mss,sok,ts,nop,ws::012
4:110+18:0:1329:29184,7:mss,sok,ts,nop,ws::08
4:113+15:0:1329:29184,7:mss,sok,ts,nop,ws::08
4:111+17:0:1329:29184,7:mss,sok,ts,nop,ws::08
4:105+23:0:1329:29184,7:mss,sok,ts,nop,ws::07
4:114+14:0:1329:29184,7:mss,sok,ts,nop,ws::07
4:115+13:0:1329:29184,7:mss,sok,ts,nop,ws::06
4:112+16:0:1329:29184,7:mss,sok,ts,nop,ws::05
4:116+12:0:1329:29184,7:mss,sok,ts,nop,ws::05
4:108+20:0:1329:29184,7:mss,sok,ts,nop,ws::04

User-Agent

fingerprintco-occurrences
curl/8.14.180

Country

fingerprintco-occurrences
TH · Thailand26
JP · Japan16
RU · Russia10
KR · South Korea5
MX · Mexico5
FR · France2
HU · Hungary2
AR · Argentina2
US · United States1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS133481 · AIS Fibre17
AS45758 · Advanced Wireless Network Company Limited7
AS4766 · Korea Telecom4
AS17676 · SoftBank Corp.3
AS2527 · Sony Network Communications Inc.3
AS12389 · PJSC Rostelecom2
AS4713 · NTT DOCOMO BUSINESS,Inc.2
AS3215 · Orange S.A.2
AS2516 · KDDI CORPORATION2
AS13999 · Mega Cable, S.A. de C.V.2

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.80