TCP SYN (JA4T)

64240_2-4-8-1-3_1408_7

first seen 2026-07-25 06:42 · last seen 2026-10-30 01:26 · JSON

Last 7 days (2 observations)

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 window64240
Option kinds2-4-8-1-3
MSS1408
Window scale7

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
t13d1515h1_8daaf6152771_0a20fe35d3a56
t13d1515h1_8daaf6152771_de4a06bb82e33
t13d4412h1_fd39b124ee10_58ed7828516f3

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
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.3
ge11nn14enus_4a2973d235de_000000000000_0000000000003

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:49+15:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1408:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:41+23:0:1408:mss*44,7: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/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/99.0.4844.51 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/88.0.4324.182 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.152 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil6
PL · Poland6

Network (ASN)

fingerprintco-occurrences
AS39603 · P4 Sp. z o.o.5
AS201019 · P4 Sp. z o.o.1
AS265911 · G6 Internet1
AS269039 · DENISE DE OLIVEIRA SILVA1
AS268738 · M3 Net Fibra LTDA - ME1
AS268611 · WJ NET1
AS266248 · NetSV Serviço de Comunicação Multimídia LTDA1
AS270721 · 3COMNECT TELECOM LTDA1

TLS supported groups

fingerprintco-occurrences
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.1
0a0a,001d,0017,00181