TCP SYN (JA4T)

64240_2-4-8-1-3_1400_1

first seen 2026-07-30 22:08 · last seen 2026-10-27 05:46 · 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 window64240
Option kinds2-4-8-1-3
MSS1400
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_0a20fe35d3a522
t13d1515h1_8daaf6152771_de4a06bb82e320
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
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.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
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000030
ge11nn14enus_4a2973d235de_000000000000_00000000000013
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 1.27.3, +14 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge20nn140000_02563f2d0fa8_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, +39 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn040000_177aea7101ae_000000000000_0000000000001

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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.4
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:41+23:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:06
4:47+17:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:06
4:48+16:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:06
4:45+19:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:05
4:46+18:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:05
4:52+12:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:04
4:49+15:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:50+14:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:03
4:51+13:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1400:mss*44,1:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.366
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.363

Country

fingerprintco-occurrences
BR · Brazil18
SA · Saudi Arabia6
TR · Turkey3
PH · Philippines3
IQ · Iraq3
ID · Indonesia2
ZA · South Africa2
TN · Tunisia2
PS · Palestinian Territories2
PY · Paraguay1

Network (ASN)

fingerprintco-occurrences
AS43766 · Mobile Telecommunication Company Saudi Arabia Joint-Stock company4
AS17639 · Converge ICT Solutions Inc.2
AS35819 · Etihad Etisalat, a joint stock company2
AS37693 · OOREDOO TUNISIE SA2
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd2
AS28656 · BTT TELECOMUNICACOES S.A.2
AS12975 · PALTEL Autonomous System2
AS265175 · AS SISTEMAS LTDA2
AS264923 · JB Telecom LTDA2
AS27895 · Núcleo S.A.1

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00187
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.3