TCP SYN (JA4T)

64240_2-1-3-1-1-4_1298_8

first seen 2026-10-04 14:44 · last seen 2026-10-04 16:07 · 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 window64240
Option kinds2-1-3-1-1-4
MSS1298
Window scale8

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
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 156.0.8078.48, chrome 154.0.8037.57, +27 more.The fingerprint page shows the full measured match list. More on the catalog.9

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12de00_54b4638ab28b_000000000000_0000000000006
ge20nn13de00_0c2c1d640f3e_000000000000_0000000000001
ge20nn13de00_0e897bb088aa_000000000000_0000000000001
ge20nn14de00_00c893c2b404_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 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog.6
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.3

TCP SYN (p0f)

fingerprintco-occurrences
4:110+18:0:1298:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:09

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.369

Country

fingerprintco-occurrences
DE · Germany9

Network (ASN)

fingerprintco-occurrences
AS8881 · 1&1 Versatel GmbH9