TCP SYN (JA4T)

65535_2-4-8-1-3_1404_6

first seen 2026-07-16 01:07 · last seen 2026-09-15 06:43 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 12/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
MSS1404
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_58ed7828516f57
t13d1515h1_8daaf6152771_de4a06bb82e324
t13d1515h1_8daaf6152771_0a20fe35d3a520
t13d1516h1_8daaf6152771_1a63afa7c4784
t13d1517h2_8daaf6152771_b1ff8ab2d16f1

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.57
ge11nn13enus_9db22d02e17a_000000000000_00000000000036
ge11nn14enus_4a2973d235de_000000000000_00000000000012
ge20nr13zhcn_e2ac93ffb364_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
4:48+16:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:038
4:49+15:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:024
4:47+17:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:018
4:51+13:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:012
4:52+12:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:06
4:36+28:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:46+18:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1404:65535,6:mss,sok,ts,nop,ws::01
4:42+22:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1404:65535,6:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.368
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.367
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.366
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/119.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
JO · Jordan97
IR · Iran7
BG · Bulgaria1
VE · Venezuela1

Network (ASN)

fingerprintco-occurrences
AS8376 · Jordan Data Communications Company LLC97
AS58224 · Iran Telecommunication Company PJS7
AS29244 · CETIN Bulgaria EAD1
AS264731 · Corporacion Digitel C.A.1