TCP SYN (JA4T)

64240_2-4-8-1-3_1344_10

first seen 2026-10-14 03:48 · last seen 2026-10-14 18:13 · 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 kinds2-4-8-1-3
MSS1344
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
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06pl00_0c8b1e8e556a_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1344:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1344:mss*44,10:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; OnlineShopsBot/0.1; +https://verosoft.pl)2

Country

fingerprintco-occurrences
PL · Poland2

Network (ASN)

fingerprintco-occurrences
AS12912 · T-Mobile Polska S.A.2

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.1