TCP SYN (JA4T)

64952_2-4-8-1-3_1400_10

first seen 2026-07-02 11:59 · last seen 2026-10-23 22:43 · JSON

Distinct clients per day (last 30 days, peak 3/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 window64952
Option kinds2-4-8-1-3
MSS1400
Window scale10

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
t13d3013h2_1d37bd780c83_8537cf56674e3
t13d9013h1_c6771aded2ed_57a60bdf03d12

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_bf75ddd0bb29_000000000000_0000000000003
ge11nn06enus_fb4afd1f380a_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1400:64952,10:mss,sok,ts,nop,ws:df,id+:03
4:48+16:0:1400:64952,10:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
curl/8.14.13
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.362

Country

fingerprintco-occurrences
DE · Germany3
TN · Tunisia2

Network (ASN)

fingerprintco-occurrences
AS36231 · Tempest Hosting3
AS37693 · OOREDOO TUNISIE SA2

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.3