TCP SYN (JA4T)

29200_2-4-8-1-3_1400_7

first seen 2026-07-01 12:10 · last seen 2026-10-28 11:10 · JSON

Last 7 days (25 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 window	`29200`
Option kinds	`2-4-8-1-3`
MSS	`1400`
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
`t13d4312h1_c7886603b240_b26ce05bbdd6`	124
`t13d491000_834380eab35e_5ac7197df9d2`	16
`t13i170900_5b57614c22b0_78e6aca7449b`	4
`t13d190900_9dc949149365_97f8aa674fd9`	3
`t13d1516h2_8daaf6152771_806a8c22fdea` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`t13d1516h2_8daaf6152771_02713d6af862` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	125
`ge11nn050000_0b4164a3b800_000000000000_000000000000`	3
`ge11nn060000_04b3596173ac_000000000000_000000000000`	3
`ge11nn070000_f1c095c421c4_000000000000_000000000000`	3
`ge11nn050000_3658ef221638_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.25.0, wget 1.21.3.The fingerprint page shows the full measured match list. More on the catalog.	2
`ge11nn050000_1b4a3c75e91c_000000000000_000000000000`	2
`ge11nn050000_909c614022eb_000000000000_000000000000`	2
`ge20nn12enus_60f823d07c94_000000000000_000000000000`	1
`ge20nn13enus_0c2c1d640f3e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`ge11nn050000_c727097c2f59_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.	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:220\|m,s,a,p`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:49+15:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	106
`4:48+16:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	18
`4:47+17:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	9
`4:51+13:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:50+14:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:52+12:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	3
`4:55+9:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:56+8:0:1400:mss*20,7:mss,sok,ts,nop,ws:df,id+:0`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/120.0.0.0`	121
`libredtail-http`	4
`Go-http-client/1.1`	3
`Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Mobile Safari/537.36`	3
`Mozilla/5.051975669 Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36`	3
`Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1`	2
`Mozilla/5.0 (iPad; CPU OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Version/9.0 Mobile/13B143 Safari/601.1`	2
`Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`	2
`Mozilla/5.082584686 Mozilla/5.0 (iPhone; CPU iPhone OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`CN` · China	140
`US` · United States	4
`PH` · Philippines	2
`DO` · Dominican Republic	2
`SE` · Sweden	1
`ME` · Montenegro	1

Network (ASN)

fingerprint	co-occurrences
`AS4837` · CHINA UNICOM China169 Backbone	70
`AS4134` · CHINANET BACKBONE	49
`AS17638` · ASN for TIANJIN Provincial Net of CT	8
`AS17622` · China Unicom Guangzhou network	4
`AS53667` · FranTech Solutions	4
`AS17621` · China Unicom Shanghai network	3
`AS140061` · Qinghai Telecom	3
`AS137266` · CHINATELECOM Hubei province Wuhan 5G network	2
`AS6400` · Compañía Dominicana de Teléfonos S. A.	2
`AS3301` · Telia Company AB	1

TLS supported groups

fingerprint	co-occurrences
`001d,0017,001e,0019,0018`	45
`001d,0017,001e,0019,0018,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`0a0a,001d,0017,0018`	1