TCP SYN (JA4T)

29200_2-4-8-1-3_1424_7

first seen 2026-06-29 23:18 · last seen 2026-11-01 02:28 · JSON

Last 7 days (609 observations)

Distinct clients per day (last 30 days, peak 99/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
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_e5728521abd47904
t13d190900_9dc949149365_97f8aa674fd91621
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1583
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.241
t13d311000_e8f1e7e78f70_5ac7197df9d238
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn10zhcn_9c0cf7475f83_000000000000_0000000000008702
ge11nr10zhcn_9c0cf7475f83_000000000000_0000000000002405
ge20nn15enus_a80081d13d36_000000000000_000000000000230
ge11nn05zhcn_65b616753dd4_000000000000_00000000000038
ge20nr14enus_4600588ae5ca_000000000000_00000000000011
ge11nr030000_cd680697de12_000000000000_0000000000001
ge11nr040000_8391bea91fb6_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.230
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.11

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:03051
4:49+15:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:02428
4:47+17:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:01895
4:53+11:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:01224
4:46+18:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0679
4:52+12:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0456
4:45+19:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0405
4:51+13:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0381
4:48+16:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0304
4:44+20:0:1424:mss*20,7:mss,sok,ts,nop,ws:df,id+:0267

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/604.111107
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)279
Go-http-client/1.11
Mozilla/5.0 (Linux; Android 10; LIO-AN00 Build/HUAWEILIO-AN00; wv) MicroMessenger Weixin QQ AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.62 XWEB/2692 MMWEBSDK/200901 Mobile Safari/537.361

Country

fingerprintco-occurrences
US · United States5047
SG · Singapore1333
DE · Germany1102
BR · Brazil1059
HK · Hong Kong SAR China861
KR · South Korea706
JP · Japan559
CN · China547
ID · Indonesia174

Network (ASN)

fingerprintco-occurrences
AS132203 · Tencent Building, Kejizhongyi Avenue10841
AS45090 · Shenzhen Tencent Computer Systems Company Limited268
AS4837 · CHINA UNICOM China169 Backbone146
AS134756 · CHINANET Nanjing Jishan IDC network66
AS56046 · China Mobile communications corporation51
AS146966 · China Telecom14
AS140293 · CHINATELECOM Jiangsu province Changzhou 5G network2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog.1448
0a0a,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.27