TCP SYN (JA4T)

65535_2-4-8-1-3_9174_10

first seen 2026-07-01 09:00 · last seen 2026-10-28 06:15 · JSON

Last 7 days (21 observations)

Distinct clients per day (last 30 days, peak 1/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 window65535
Option kinds2-4-8-1-3
MSS9174
Window scale10

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
t13d1611h2_1711a4c0508c_6d021c4c45cd21
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.10

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12zhcn_54b4638ab28b_000000000000_0000000000008
ge20nr14enus_ff5cb1f26f52_000000000000_0000000000006
ge20nr14enus_a725ed712cd5_000000000000_0000000000006
ge20nr14enus_8bdf938ab49f_000000000000_0000000000004
ge20nr13enus_9093f0c7a28b_000000000000_0000000000003
ge20nn13zhcn_9519c2577190_000000000000_0000000000002
ge20nn14enus_ff5cb1f26f52_000000000000_0000000000001
ge20nr14enus_00032babe3a5_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;6:262144|10485760|0|m,a,s,p21
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog.4
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +60 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +26 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:9174:65535,10:mss,sok,ts,nop,ws:df,id+:012
4:48+16:0:9174:65535,10:mss,sok,ts,nop,ws:df,id+:010
4:46+18:0:9174:65535,10:mss,sok,ts,nop,ws:df,id+:09

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.0.0 Safari/537.36 Edg/156.0.0.021
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.05
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.365

Country

fingerprintco-occurrences
HK · Hong Kong SAR China31

Network (ASN)

fingerprintco-occurrences
AS41378 · Kirino LLC21
AS38136 · Akari Networks5
AS138997 · Eons Data Communications Limited5

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.21