TCP SYN (JA4T)

28200_2-4-8-1-3_1410_7

first seen 2026-07-11 10:31 · last seen 2026-10-26 07:52 · JSON

Last 7 days (2 observations)

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 window28200
Option kinds2-4-8-1-3
MSS1410
Window scale7

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
t13d1516h2_8daaf6152771_e5627efa2ab12
t13d330900_80cecea31fe6_9da38b6fd1bc Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 1.8.0_492.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn09enus_a545420ec371_000000000000_0000000000002
ge11nn11enus_bf0046cf26b3_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1410:mss*20,7:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1410:mss*20,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.79 Safari/537.362

Country

fingerprintco-occurrences
US · United States4

Network (ASN)

fingerprintco-occurrences
AS3356 · Level 3 Parent, LLC4

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00181
0017,0018,0019,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 1.8.0_492.The fingerprint page shows the full measured match list. More on the catalog.1