TCP SYN (JA4T)

65535_2-1-1-4-1-3_1440_10

first seen 2026-08-18 04:41 · last seen 2026-09-15 03:25 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 2/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 kinds2-1-1-4-1-3
MSS1440
Window scale10

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.7

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13zhcn_0c2c1d640f3e_000000000000_0000000000006
ge20nr12zhcn_54b4638ab28b_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
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
6:48+16:0:1440:65535,10:mss,nop,nop,sok,nop,ws:flow:03
6:45+19:0:1440:65535,10:mss,nop,nop,sok,nop,ws:flow:02
6:50+14:0:1440:65535,10:mss,nop,nop,sok,nop,ws:flow:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.367

Country

fingerprintco-occurrences
CN · China7

Network (ASN)

fingerprintco-occurrences
AS56045 · China Mobile communications corporation4
AS56046 · China Mobile communications corporation2
AS9808 · China Mobile Communications Group Co., Ltd.1