TCP SYN (JA4T)

7300_2-4-8-1-3_1452_9

first seen 2026-08-19 19:21 · last seen 2026-08-19 19:21 · 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 window7300
Option kinds2-4-8-1-3
MSS1452
Window scale9

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
t13d1714h1_5b57614c22b0_43ade6aba3df2
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_08e7224bf8c7_000000000000_0000000000001
ge11nn050000_ecbf4e651318_000000000000_0000000000001
ge11nn050000_cc11d17b741b_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1452:mss*5,9:mss,sok,ts,nop,ws:df,id+:03

User-Agent

fingerprintco-occurrences
Bun/1.3.142
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
TR · Turkey3

Network (ASN)

fingerprintco-occurrences
AS34984 · Superonline Iletisim Hizmetleri A.S.3