TCP SYN (JA4T)

64240_2-4-8-1-3_1460_11

first seen 2026-06-29 23:11 · last seen 2026-09-16 16:15 · JSON

Last 7 days (6218 observations)

Distinct clients per day (last 30 days, peak 43/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
MSS1460
Window scale11

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
t13d311000_8ae6a2f5ac15_5ac7197df9d261822
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.40
t13d1616h2_86a278354501_eeeea656296028
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog.13
t13d1516h2_8daaf6152771_eeeea65629609
t13d1512h2_8daaf6152771_cbb9361b6bf94
t13d0810h2_c5294ed87595_5603904660152
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.2
t12d1814h2_29a2cd9e9f10_d267a5f792d41
t13d1312h2_1fa16d233a88_cbb9361b6bf91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_be0d0b335e46_000000000000_00000000000061822
ge20nn04enus_989c7cc05c9b_000000000000_00000000000026
ge20nn12zhcn_c0858481ddaa_000000000000_00000000000026
ge20nn11zhcn_3901d4197baf_000000000000_00000000000014
ge20nr10zhcn_b3034183f430_000000000000_00000000000012
ge20nr12zhcn_54b4638ab28b_000000000000_0000000000008
ge20nr09zhcn_bfc092dff6c6_000000000000_0000000000008
ge20nn13zhcn_fdd99696dee2_000000000000_0000000000005
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog.3
ge20nn10zhcn_d353d425b0bb_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p26
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.22
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s16
1:4096;2:0;4:32768;5:16384|12517377|5:0:0:22|m,p,a,s9
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p6
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p5
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s5
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p4
1:4096;2:0;4:32768;5:16384|12517377|9:0:0:22|m,p,a,s4
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +21 more.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:016085
4:54+10:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:015744
4:48+16:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:015026
4:50+14:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:012970
4:46+18:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:01665
4:52+12:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:0334
4:49+15:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:091
4:47+17:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:021
4:45+19:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:04
4:43+21:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:04

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; SemrushBot/7~bl; +http://www.semrush.com/bot.html)61822
Mozilla/5.0 (Android 14; Mobile; rv:153.0) Gecko/153.0 Firefox/153.025
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Mobile Safari/537.36 EdgA/147.0.0.015
Mozilla/5.0 (Android 14; Mobile; rv:154.0) Gecko/154.0 Firefox/154.09
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Mobile Safari/537.367
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Mobile Safari/537.367
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Mobile Safari/537.36 OPR/94.0.0.06
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36 EdgA/150.0.0.04
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.363
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Mobile Safari/537.36 EdgA/151.0.0.03

Country

fingerprintco-occurrences
US · United States61826
ID · Indonesia87
NO · Norway26
DE · Germany2
NL · Netherlands2
CH · Switzerland2
TH · Thailand1

Network (ASN)

fingerprintco-occurrences
AS209366 · SEMrush CY LTD61822
AS45102 · Alibaba (US) Technology Co., Ltd.87
AS56655 · Gigahost AS26
AS51852 · Private Layer INC2
AS396362 · Leaseweb USA, Inc.2
AS24940 · Hetzner Online GmbH1
AS36352 · HostPapa1
AS211301 · Unesty Company1
AS30633 · Leaseweb USA, Inc.1
AS210976 · Timeweb, LLP1