TCP SYN (JA4T)

65535_2-1-3-1-1-4_1390_8

first seen 2026-08-30 03:54 · last seen 2026-09-06 00:03 · 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 window65535
Option kinds2-1-3-1-1-4
MSS1390
Window scale8

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
t13d2013h1_2b729b4bf6f3_e24568c0d4402
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d201200_2b729b4bf6f3_e24568c0d4401

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nr16enus_94fdc06e0694_000000000000_0000000000001
po11nn07trtr_7d361e250c48_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +43 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
6:44+20:0:1390:65535,8:mss,nop,ws,nop,nop,sok:flow:02
4:115+13:0:1390:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01
6:52+12:0:1390:65535,8:mss,nop,ws,nop,nop,sok:flow:01

User-Agent

fingerprintco-occurrences
curl/8.21.02
Mozilla/5.0 (Linux; Android 14; SM-S921B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Windows NT 6.3; x86) AppleWebKit/537.36 (KHTML, like Gecko) Opera/80.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
TW · Taiwan2
US · United States1
TR · Turkey1

Network (ASN)

fingerprintco-occurrences
AS9674 · Far EastTone Telecommunication Co., Ltd.2
AS7018 · AT&T Enterprises, LLC1
AS16135 · Turkcell A.S.1