TCP SYN (JA4T)

29200_2-4-8-1-3_1460_9

first seen 2026-07-01 15:06 · last seen 2026-09-03 13:11 · JSON

Distinct clients per day (last 30 days, peak 1/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
MSS1460
Window scale9

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
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog.5
t13d1713h1_ab0a1bf427ad_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.32.3, python-requests 2.33.1.The fingerprint page shows the full measured match list. More on the catalog.3
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.2
t12d280700_b75078996b15_6b16546de8022
t13i170900_5b57614c22b0_78e6aca7449b2
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.0, rust-hyper 1.11.1, rust-hyper 1.10.1.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12zhcn_54b4638ab28b_000000000000_0000000000004
he11nn070000_1f3150f029d9_000000000000_0000000000003
ge11nn030000_32287c24fa5b_000000000000_0000000000002
ge11nn030000_4a12205bdc65_000000000000_0000000000001
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.5, powershell 7.6.4, go-net/http 1.27.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn040000_e1d2031bdfea_000000000000_0000000000001
ge20nn13zhcn_0c2c1d640f3e_000000000000_0000000000001
ge11nn070000_f395b2c4bb38_000000000000_0000000000001
ge11nn050000_e81ae831f766_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|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.1
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:05
4:42+22:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:03
4:48+16:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1460:mss*20,9:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.363
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.02
curl/7.29.02
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.4213.1921 Mobile Safari/537.361

Country

fingerprintco-occurrences
HK · Hong Kong SAR China7
CN · China6
FR · France2

Network (ASN)

fingerprintco-occurrences
AS9908 · HK Cable TV Ltd5
AS37963 · Hangzhou Alibaba Advertising Co.,Ltd.3
AS45102 · Alibaba (US) Technology Co., Ltd.2
AS12876 · Scaleway SAS2
AS38365 · Beijing Baidu Netcom Science and Technology Co., Ltd.2
AS137266 · CHINATELECOM Hubei province Wuhan 5G network1