TCP SYN (JA4T)

25380_2-4-8-1-3_1424_7

first seen 2026-06-30 08:28 · last seen 2026-09-16 03:37 · JSON

Last 7 days (54 observations)

Distinct clients per day (last 30 days, peak 18/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 window25380
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
t13d131100_f57a46bbacb6_e5728521abd4581
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.43
t13d311000_e8f1e7e78f70_5ac7197df9d24

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000425
ge11nr10zhcn_9c0cf7475f83_000000000000_000000000000156
ge20nn15enus_a80081d13d36_000000000000_00000000000043
ge11nn05zhcn_65b616753dd4_000000000000_0000000000004

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.43

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0137
4:53+11:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0111
4:47+17:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:082
4:50+14:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:072
4:43+21:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:055
4:48+16:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:040
4:42+22:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:035
4:46+18:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:035
4:52+12:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:025
4:41+23:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:015

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1581
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)47

Country

fingerprintco-occurrences
SG · Singapore133
KR · South Korea116
TH · Thailand108
US · United States78
JP · Japan68
CN · China47
DE · Germany43
ID · Indonesia35

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue581
AS56046 · China Mobile communications corporation21
AS134756 · CHINANET Nanjing Jishan IDC network14
AS4837 · CHINA UNICOM China169 Backbone12