TCP SYN (JA4T)

64240_2-4-8-1-3_1452_1

first seen 2026-08-25 05:01 · last seen 2026-10-27 05:15 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 6/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
MSS1452
Window scale1

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_0a20fe35d3a555
t13d1515h1_8daaf6152771_de4a06bb82e351
t13d1516h1_8daaf6152771_1a63afa7c47812
t13d2812h2_257f3020b3a2_cbb9361b6bf94
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
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.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000077
ge11nn14enus_4a2973d235de_000000000000_00000000000041
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.0, +14 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge20nr130000_8b0ff7948a7d_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

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p3
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
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog.2
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, +26 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:018
4:47+17:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:014
4:46+18:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:013
4:44+20:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:012
4:48+16:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:012
4:42+22:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:011
4:50+14:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:09
4:51+13:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:08
4:49+15:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:07
4:43+21:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:06

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.3614
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.3611
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.3611
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.3610
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.3610
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.369
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.369
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.368
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.368
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.367

Country

fingerprintco-occurrences
BR · Brazil52
IN · India9
VN · Vietnam7
ID · Indonesia6
TR · Turkey6
IT · Italy5
PE · Peru5
CO · Colombia5
ZA · South Africa4
BO · Bolivia4

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp5
AS9121 · Turk Telekomunikasyon Anonim Sirketi5
AS26599 · TELEFÔNICA BRASIL S.A5
AS9829 · National Internet Backbone4
AS6147 · INTEGRATEL PERÚ S.A.A.4
AS3269 · Telecom Italia S.p.A.3
AS18881 · TELEFÔNICA BRASIL S.A3
AS4788 · TM TECHNOLOGY SERVICES SDN. BHD.2
AS7552 · Viettel Group2
AS8151 · Uninet S.A. de C.V.2

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00186
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.4
0a0a,6399,001d,0017,00181