TCP SYN (JA4T)

64240_2-1-3-1-1-4_1240_8

first seen 2026-08-27 19:21 · last seen 2026-09-15 02:32 · JSON

Last 7 days (5 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 kinds2-1-3-1-1-4
MSS1240
Window scale8

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.3
t13d2913h1_723694b0fccc_5671b5df50293
t13d2012h1_2b729b4bf6f3_9e7b989ebec83
t13d2013h1_2b729b4bf6f3_e24568c0d4402

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.5
ge11nr11deat_835281d8e5d9_000000000000_0000000000003
ge20nr16deat_94fdc06e0694_000000000000_0000000000003

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.3

TCP SYN (p0f)

fingerprintco-occurrences
4:110+18:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:03
4:115+13:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok::03
4:111+17:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:116+12:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:112+16:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:114+14:0:1240:mss*44,8:mss,nop,ws,nop,nop,sok::01

User-Agent

fingerprintco-occurrences
curl/8.7.13
Mozilla/5.0 (Linux; Android 14; SM-S926B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.363
curl/8.18.02
Mozilla/5.0 (iPad; CPU OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.12
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/153.0 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
AT · Austria6
JP · Japan5

Network (ASN)

fingerprintco-occurrences
AS8412 · T-Mobile Austria GmbH6
AS2516 · KDDI CORPORATION5