TCP SYN (JA4T)

64240_2-4-8-1-3_1410_7

first seen 2026-07-22 13:01 · last seen 2026-10-30 19:05 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 3/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
MSS1410
Window scale7

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
t13d4312h1_c7886603b240_b26ce05bbdd615
t13d4412h1_fd39b124ee10_58ed7828516f6
t13d1515h1_8daaf6152771_0a20fe35d3a55
t13d1515h1_8daaf6152771_de4a06bb82e35
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.2
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.2
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.1

HTTP request (JA4H)

fingerprintco-occurrences
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.21
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
ge11nn14enus_4a2973d235de_000000000000_0000000000004
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.3
ge20nr13enus_e2ac93ffb364_000000000000_0000000000001
ge11nr16zhcn_3dfdba18536b_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, +57 more.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (p0f)

fingerprintco-occurrences
4:43+21:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:07
4:44+20:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:52+12:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:46+18:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:39+25:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1410:mss*44,7:mss,sok,ts,nop,ws::02
4:236+19:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:241+14:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:242+13:0:1410:mss*44,7:mss,sok,ts,nop,ws:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.365
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
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
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
ES · Spain9
TR · Turkey6
BR · Brazil5
KW · Kuwait5
ID · Indonesia3
SI · Slovenia2
DE · Germany1
CA · Canada1
RU · Russia1
IE · Ireland1

Network (ASN)

fingerprintco-occurrences
AS12735 · TurkNet Iletisim Hizmetleri A.S.6
AS42961 · Mobile Telecommunications Company K.S.C.P.5
AS12479 · Orange Espagne SA5
AS12430 · VODAFONE ESPANA S.A.U.4
AS38511 · PT Remala Abadi2
AS21283 · A1 Slovenija telekomunikacijske storitve,d.d.2
AS6805 · Telefonica Germany GmbH & Co.OHG1
AS5384 · Emirates Internet1
AS26615 · TIM S/A1
AS13280 · Three Ireland (Hutchison) limited1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.13
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.2
0a0a,001d,0017,00182
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1