TCP SYN (JA4T)

64240_2-4-8-1-3_1448_7

first seen 2026-07-22 14:27 · last seen 2026-09-05 08:33 · JSON

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 window64240
Option kinds2-4-8-1-3
MSS1448
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
t13d4412h1_fd39b124ee10_58ed7828516f8
t13d1515h1_8daaf6152771_0a20fe35d3a57
t13d1515h1_8daaf6152771_de4a06bb82e31

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.8
ge11nn13enus_9db22d02e17a_000000000000_0000000000005
ge11nn14enus_4a2973d235de_000000000000_0000000000003

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:45+19:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:42+22:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:238+17:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1448:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1448: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/131.0.0.0 Safari/537.362
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/123.0.0.0 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 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 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.41 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.779 Safari/537.361

Country

fingerprintco-occurrences
VN · Vietnam7
BR · Brazil4
MX · Mexico1
RU · Russia1
IT · Italy1
CL · Chile1
PS · Palestinian Territories1

Network (ASN)

fingerprintco-occurrences
AS18403 · FPT Telecom Company7
AS12389 · PJSC Rostelecom1
AS1267 · WIND TRE S.P.A.1
AS11888 · Television Internacional, S.A. de C.V.1
AS12975 · PALTEL Autonomous System1
AS270380 · PROVELINK TELECOM LTDA1
AS270498 · ACCONECT TELECOM LTDA - ME1
AS265830 · FULL CONECTION LTDA1
AS267221 · Gold Telecom Ltda1
AS269502 · TECHNET COMUNICACAO MULTIMIDIA LTDA1