TCP SYN (JA4T)

65535_2-4-8-1-3_1450_6

first seen 2026-07-21 22:59 · last seen 2026-10-31 17:10 · JSON

Last 7 days (6 observations)

Distinct clients per day (last 30 days, peak 3/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 kinds2-4-8-1-3
MSS1450
Window scale6

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
t13d4412h1_fd39b124ee10_58ed7828516f19
t13d1515h1_8daaf6152771_de4a06bb82e318
t13d1515h1_8daaf6152771_0a20fe35d3a511
t13d4312h1_c7886603b240_b26ce05bbdd69
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.4
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d1516h1_8daaf6152771_1a63afa7c4783
t13d2013h1_a09f3c656075_7f0f34a4126d1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.28
ge11nn13enus_9db22d02e17a_000000000000_00000000000023
ge11nn14enus_4a2973d235de_000000000000_0000000000009
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.7
ge11nn09enus_f667795aa03b_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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.7

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:015
4:43+21:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:011
4:41+23:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:09
4:47+17:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:08
4:42+22:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:07
4:44+20:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:07
4:46+18:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:04
4:51+13:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:53+11:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:49+15:0:1450:65535,6:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
BR · Brazil37
AR · Argentina18
PL · Poland2
IN · India2
IT · Italy2
DO · Dominican Republic2
MX · Mexico1
ID · Indonesia1
IL · Israel1
AL · Albania1

Network (ASN)

fingerprintco-occurrences
AS28201 · Companhia Itabirana Telecomunicações Ltda28
AS7303 · Telecom Argentina S.A.17
AS262669 · Companhia Itabirana Telecomunicações Ltda6
AS138754 · Kerala Vision Broad Band Private Limited2
AS29167 · Netia SA2
AS274035 · ARCOFIBER CONEXIONES SRL (RODRITEL)2
AS210218 · Open Fiber S.P.A.2
AS8376 · Jordan Data Communications Company LLC1
AS273865 · AREVALO CARLOS ALBERTO1
AS138089 · PT.Global Media Data Prima1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.6
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.6
0a0a,001d,0017,00182
0a0a,11ec,001d,0017,0018,00191