TCP SYN (JA4T)

29200_2-4-8-1-3_1440_6

first seen 2026-09-05 03:47 · last seen 2026-09-05 03:47 · 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 window29200
Option kinds2-4-8-1-3
MSS1440
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
t13d1313h2_f57a46bbacb6_7f0f34a4126d1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn08ru00_1945e0741196_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1440:mss*20,6:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.01

Country

fingerprintco-occurrences
RU · Russia1

Network (ASN)

fingerprintco-occurrences
AS39435 · JSC "ER-Telecom Holding"1