TCP SYN (JA4T)

64860_2-1-3-1-1-4_1340_8

first seen 2026-07-01 14:54 · last seen 2026-10-29 14:29 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 7/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 window64860
Option kinds2-1-3-1-1-4
MSS1340
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
t13d101100_01be160bb49b_36bf25f296df Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.5, powershell 5.1.26100.33296, +8 more.The fingerprint page shows the full measured match list. More on the catalog.15
t12d080700_0df93f53a2f9_2dae41c691ec7
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.1
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
he11nn07en00_806ad52065dd_000000000000_0000000000008
ge11nn07en00_806ad52065dd_000000000000_0000000000005
he11nn030000_44b0325fbcb5_000000000000_0000000000004
ge11nn06en00_827c3ac6a18a_000000000000_0000000000003
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn07de00_806ad52065dd_000000000000_0000000000002

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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:104+24:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:05
4:114+14:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:03
4:112+16:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:03
4:108+20:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:03
4:108+20:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:109+19:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:103+25:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:106+22:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:111+17:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:105+23:0:1340:mtu*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1; WOW64) SkypeUriPreview Preview/0.5 skype-url-preview@microsoft.com18
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.01

Country

fingerprintco-occurrences
US · United States14
IE · Ireland5
CH · Switzerland2
FR · France2
JP · Japan1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation22
AS51852 · Private Layer INC2

TLS supported groups

fingerprintco-occurrences
0018,0017 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.7, powershell 5.1.26100.33648, curl 8.21.0.The fingerprint page shows the full measured match list. More on the catalog.1