TCP SYN (p0f)

4:40+24:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-05 04:13 · last seen 2026-10-20 19:01 · 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

IP version	`4`
Initial TTL	`40+24`
Options length	`0`
MSS	`1460`
Window size	`mss*29`
Window scale	`10`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`df,id+`
Payload class	`0`

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_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.	10
`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.	3

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn090000_6aab3d3a70e6_000000000000_000000000000`	4
`ge20nr080000_b3b8e45d0c4c_000000000000_000000000000`	4
`ge20nn090000_3fc2d4f2629d_000000000000_000000000000`	1
`ge20nr080000_436add3393bb_000000000000_000000000000`	1
`ge20nn090000_924e13d34715_000000000000_000000000000`	1
`ge20nn10zhcn_06e2da52e592_000000000000_000000000000`	1
`ge20nr09zhcn_cddb52409263_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.	7
`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.	4
`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, +26 more.The fingerprint page shows the full measured match list. More on the catalog.	2

TCP SYN (JA4T)

fingerprint	co-occurrences
`42340_2-4-8-1-3_1460_10`	13

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Linux; Android 13; PFFM10 Build/TP1A.220905.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.181 Mobile Safari/537.36 aweme_250000 JsSdk/1.0 NetType/WIFI Channel/31725782a AppName/aweme app_version/25.0.0 ByteLocale/zh-CN Region/CN AppSkin/white AppTheme/light BULLET/1 BytedanceWebview/d8a21c6 TTWebView/0881130048402`	6
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36`	4
`Mozilla/5.0 (Linux; Android 10; HD1900 Build/QKQ1.190716.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/75.0.3770.156 Mobile Safari/537.36 aweme_230400 JsSdk/1.0 NetType/WIFI AppName/aweme app_version/23.4.0 ByteLocale/zh-CN Region/CN AppSkin/white AppTheme/light BytedanceWebview/d8a21c6 WebView/075113004008`	2
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36`	1

Country

fingerprint	co-occurrences
`CN` · China	13

Network (ASN)

fingerprint	co-occurrences
`AS55960` · Beijing Guanghuan Xinwang Digital	13

TLS supported groups

fingerprint	co-occurrences
`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.	2

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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.	7
`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.	4
`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, +26 more.The fingerprint page shows the full measured match list. More on the catalog.	2