TCP SYN (JA4T)

25380_2-4-8-1-3_1424_7

first seen 2026-06-30 08:28 · last seen 2026-10-31 17:10 · JSON

Last 7 days (67 observations)

Distinct clients per day (last 30 days, peak 13/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_e5728521abd4989
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.59
t13d311000_e8f1e7e78f70_5ac7197df9d25

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_000000000000780
ge11nr10zhcn_9c0cf7475f83_000000000000_000000000000209
ge20nn15enus_a80081d13d36_000000000000_00000000000057
ge11nn05zhcn_65b616753dd4_000000000000_0000000000005
ge20nr14enus_4600588ae5ca_000000000000_0000000000002

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.57
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, +81 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0230
4:53+11:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0186
4:47+17:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:0161
4:42+22:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:093
4:50+14:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:084
4:43+21:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:075
4:48+16:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:074
4:46+18:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:051
4:52+12:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:038
4:45+19:0:1424:25380,7:mss,sok,ts,nop,ws:df,id+:020

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/604.1989
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)64

Country

fingerprintco-occurrences
SG · Singapore217
KR · South Korea192
TH · Thailand183
JP · Japan141
US · United States129
DE · Germany67
CN · China64
ID · Indonesia60

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue989
AS56046 · China Mobile communications corporation28
AS134756 · CHINANET Nanjing Jishan IDC network21
AS4837 · CHINA UNICOM China169 Backbone15

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.146
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.9