TCP SYN (JA4T)

64240_2-4-8-1-3_1289_10

first seen 2026-07-31 10:32 · last seen 2026-09-03 12:38 · JSON

Decomposed attributes

TCP window64240
Option kinds2-4-8-1-3
MSS1289
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
t13d2014h2_a09f3c656075_14788d8d241b1
t13d2613h2_2802a3db6c62_845d286b0d671

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn08enus_1945e0741196_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nr08isis_1945e0741196_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:4194304;3:100|10485760|1:0:0:255|m,s,p,a2

TCP SYN (p0f)

fingerprintco-occurrences
4:118+10:0:1289:mss*44,10:mss,sok,ts,nop,ws:df,id+:01
4:113+15:0:1289:mss*44,10:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.4 Safari/605.1.151
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
US · United States1
IS · Iceland1

Network (ASN)

fingerprintco-occurrences
AS11878 · tzulo, inc.1
AS206804 · EstNOC GLOBAL1