TCP SYN (JA4T)

62580_2-4-8-1-3_8940_7

first seen 2026-07-06 06:39 · last seen 2026-10-01 10:58 · JSON

Decomposed attributes

TCP window62580
Option kinds2-4-8-1-3
MSS8940
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
t13d301200_1d37bd780c83_ecd0401ec68b3
t13d1715h2_5b57614c22b0_a54fffd0eb611
t13d311000_e8f1e7e78f70_1f22a2ca17c41

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05enus_6f062c0f61f5_000000000000_0000000000004
ge20nn14enus_f17998ff6631_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:52+12:0:8940:mss*7,7:mss,sok,ts,nop,ws:flow:03
6:47+17:0:8940:mss*7,7:mss,sok,ts,nop,ws:flow:01
6:54+10:0:8940:mss*7,7:mss,sok,ts,nop,ws:flow:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.361
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.361

Country

fingerprintco-occurrences
TR · Turkey4
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS44382 · Fiba Cloud Operation Company, LLC4
AS214503 · QuxLabs AB1