TCP SYN (JA4T)

29200_2-4-8-1-3_1400_6

first seen 2026-09-28 03:45 · last seen 2026-10-14 04:12 · JSON

Distinct clients per day (last 30 days, peak 39/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 window29200
Option kinds2-4-8-1-3
MSS1400
Window scale6

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
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.230

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.230

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.230

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:068
4:48+16:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:067
4:46+18:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:052
4:50+14:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:015
4:49+15:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:011
4:45+19:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:06
4:44+20:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:03
4:42+22:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:03
4:43+21:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:02
4:41+23:0:1400:mss*20,6:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36230

Country

fingerprintco-occurrences
CN · China230

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE74
AS4837 · CHINA UNICOM China169 Backbone67
AS9808 · China Mobile Communications Group Co., Ltd.32
AS24445 · Henan Mobile Communications Co.,Ltd23
AS140292 · CHINATELECOM Jiangsu province Suzhou 5G network8
AS56041 · China Mobile communications corporation4
AS56042 · China Mobile communications corporation4
AS56047 · China Mobile communications corporation4
AS56045 · China Mobile communications corporation3
AS17816 · China Unicom IP network China169 Guangdong province2