TCP SYN (JA4T)

65535_2-1-3-1-1-8-4-0-0_1272_6

first seen 2026-09-15 06:09 · last seen 2026-09-24 12:00 · JSON

Decomposed attributes

TCP window65535
Option kinds2-1-3-1-1-8-4-0-0
MSS1272
Window scale6

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
t13d3113h2_e8f1e7e78f70_1b3407e2c9361
t13d2013h1_a09f3c656075_7f0f34a4126d1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1, curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:54+10:0:1272:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:01
6:44+20:0:1272:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:flow:01

User-Agent

fingerprintco-occurrences
curl/8.21.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0 Safari/537.361

Country

fingerprintco-occurrences
RU · Russia2

Network (ASN)

fingerprintco-occurrences
AS12389 · PJSC Rostelecom1
AS25159 · PJSC MegaFon1