TCP SYN (JA4T)

64240_2-4-8-1-3_1255_7

first seen 2026-09-22 20:15 · last seen 2026-09-23 13:04 · JSON

Decomposed attributes

TCP window64240
Option kinds2-4-8-1-3
MSS1255
Window scale7

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_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.5
t13d1517h2_8daaf6152771_dcad5a0539912

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr14dede_273cb9519eb0_000000000000_0000000000003
ge20nn15enus_0a06f3270101_000000000000_0000000000002
ge20nn15dede_0a06f3270101_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-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.2
1:65536;2:0;4:6291456;6:262144;43658:3836518077|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;51962:1302629678|15663105|3:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;51962:187317428|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;51914:1168031193|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;43546:880621162|15663105|1:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1255:mss*44,7:mss,sok,ts,nop,ws:df,id+:04
4:51+13:0:1255:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1255:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1255:mss*44,7: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/131.0.0.0 Safari/537.365
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
NL · Netherlands5
DE · Germany2

Network (ASN)

fingerprintco-occurrences
AS43350 · NForce Entertainment B.V.4
AS212238 · Datacamp Limited1
AS62240 · Clouvider1
AS62651 · Strong Technology, LLC.1