TCP SYN (JA4T)

59220_2-4-8-1-3_1424_7

first seen 2026-08-07 03:21 · last seen 2026-09-15 01:45 · JSON

Last 7 days (9 observations)

Distinct clients per day (last 30 days, peak 6/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 window59220
Option kinds2-4-8-1-3
MSS1424
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
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.50
t13i170900_5b57614c22b0_78e6aca7449b2
t13d3612h2_018971650b2c_d25cae7eed4b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn15enus_a80081d13d36_000000000000_00000000000042
ge20nr14enus_4600588ae5ca_000000000000_0000000000008
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn070000_f395b2c4bb38_000000000000_0000000000001
ge11nn050000_e81ae831f766_000000000000_0000000000001

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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.42
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.8
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:016
4:46+18:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:015
4:44+20:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:09
4:53+11:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:04
4:49+15:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:03
4:48+16:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.3625
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)25
libredtail-http2
curl/8.4.01

Country

fingerprintco-occurrences
CN · China26
US · United States19
HK · Hong Kong SAR China4
JP · Japan2
DE · Germany1
KR · South Korea1

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue27
AS4837 · CHINA UNICOM China169 Backbone23
AS56046 · China Mobile communications corporation2
AS45090 · Shenzhen Tencent Computer Systems Company Limited1