TCP SYN (JA4T)

65535_2-1-3-1-1-4_1424_8

first seen 2026-08-27 13:20 · last seen 2026-08-31 05:11 · 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
MSS1424
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
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.5
t13d2913h1_723694b0fccc_5671b5df50291

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16svse_94fdc06e0694_000000000000_0000000000004
ge20nr16eses_94fdc06e0694_000000000000_0000000000001
ge11nr11deat_835281d8e5d9_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.5

TCP SYN (p0f)

fingerprintco-occurrences
4:109+19:0:1424:65535,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:111+17:0:1424:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:110+18:0:1424:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:50+14:0:1424:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:55+9:0:1424:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 14; SM-S928B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 OPR/135.0.0.02
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
CO · Colombia2
DZ · Algeria2
ES · Spain1
AT · Austria1

Network (ASN)

fingerprintco-occurrences
AS10620 · Telmex Colombia S.A.2
AS33779 · Wataniya Telecom Algerie2
AS8447 · A1 Telekom Austria AG1
AS57269 · DIGI SPAIN TELECOM S.A1