TCP SYN (JA4T)

59220_2-4-8-1-3_1424_7

first seen 2026-08-07 03:21 · last seen 2026-10-27 14:49 · JSON

Last 7 days (6 observations)

Distinct clients per day (last 30 days, peak 3/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 window	`59220`
Option kinds	`2-4-8-1-3`
MSS	`1424`
Window scale	`7`

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)

fingerprint	co-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.	99
`t13i170900_5b57614c22b0_78e6aca7449b`	2
`t13d3013h2_1d37bd780c83_8537cf56674e`	1
`t13d3612h2_018971650b2c_d25cae7eed4b`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn15enus_a80081d13d36_000000000000_000000000000`	76
`ge20nr14enus_4600588ae5ca_000000000000_000000000000`	23
`ge20nn020000_5594a17e7e7e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge20nn030000_bf75ddd0bb29_000000000000_000000000000`	1
`ge11nn070000_f395b2c4bb38_000000000000_000000000000`	1
`ge11nn050000_e81ae831f766_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-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.	76
`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.	23
`3:100;4:65536;2:0\|1048510465\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`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)

fingerprint	co-occurrences
`4:46+18:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	33
`4:44+20:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	21
`4:45+19:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	20
`4:53+11:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:50+14:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:49+15:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:47+17:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:48+16:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	3
`4:43+21:0:1424:59220,7:mss,sok,ts,nop,ws:df,id+:0`	3

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36`	74
`Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)`	25
`libredtail-http`	2
`curl/8.14.1`	1
`curl/8.4.0`	1

Country

fingerprint	co-occurrences
`US` · United States	51
`CN` · China	26
`DE` · Germany	8
`SG` · Singapore	6
`JP` · Japan	5
`HK` · Hong Kong SAR China	5
`KR` · South Korea	2

Network (ASN)

fingerprint	co-occurrences
`AS132203` · Tencent Building, Kejizhongyi Avenue	77
`AS4837` · CHINA UNICOM China169 Backbone	23
`AS56046` · China Mobile communications corporation	2
`AS45090` · Shenzhen Tencent Computer Systems Company Limited	1

TLS supported groups

fingerprint	co-occurrences
`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.	15
`11ec,001d,0017,001e,0018,0019,0100,0101` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	1