TCP SYN (JA4T)

42340_2-4-8-1-3_1460_6

first seen 2026-07-25 05:02 · last seen 2026-10-27 04:34 · JSON

Last 7 days (1 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 window42340
Option kinds2-4-8-1-3
MSS1460
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
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d1515h1_8daaf6152771_de4a06bb82e32
t13d3013h2_1d37bd780c83_8537cf56674e1
t13d4412h1_fd39b124ee10_58ed7828516f1
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000005
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.1
ge20nn030000_bf75ddd0bb29_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:39+25:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*29,6:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1460:mss*29,6: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/119.0.0.0 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/537.361
curl/8.14.11
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.107 Safari/537.361

Country

fingerprintco-occurrences
UA · Ukraine4
RU · Russia1
IL · Israel1
SV · El Salvador1

Network (ASN)

fingerprintco-occurrences
AS12849 · Hot-Net internet services Ltd.1
AS50581 · Ukrainian Telecommunication Group LLC1
AS25082 · Viner Telecom LLC1
AS204108 · S.U.E. DPR Republic Operator of Networks1
AS64410 · BELICOM.NET LLC1
AS269769 · SERVICABLE S.A. DE C.V.1
AS154177 · LIGHT NODE LIMITED1

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00181
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1