TCP SYN (JA4T)

65535_2-4-8-1-3_1412_6

first seen 2026-07-01 12:59 · last seen 2026-09-16 11:19 · JSON

Last 7 days (174 observations)

Distinct clients per day (last 30 days, peak 632/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 window65535
Option kinds2-4-8-1-3
MSS1412
Window scale6

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
t13d4412h1_fd39b124ee10_58ed7828516f3046
t13d1515h1_8daaf6152771_de4a06bb82e31759
t13d1515h1_8daaf6152771_0a20fe35d3a51505
t13d1516h1_8daaf6152771_1a63afa7c478174
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.101
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.62
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.44
t13d1517h2_8daaf6152771_b1ff8ab2d16f14
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, urlsession 6.1.2, +1 more.The fingerprint page shows the full measured match list. More on the catalog.10
t13d2812h2_257f3020b3a2_cbb9361b6bf98

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.3050
ge11nn13enus_9db22d02e17a_000000000000_0000000000002490
ge11nn14enus_4a2973d235de_000000000000_000000000000948
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.108
ge20nr13enus_e2ac93ffb364_000000000000_00000000000041
ge20nr13zhcn_e2ac93ffb364_000000000000_00000000000031
ge20nn15enus_28e542058e45_000000000000_00000000000010
ge20nr12enus_54b4638ab28b_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, edge 151.0.4129.93, +36 more.The fingerprint page shows the full measured match list. More on the catalog.8
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.0, go-net/http 1.26.6, +10 more.The fingerprint page shows the full measured match list. More on the catalog.8
ge20nn140000_02563f2d0fa8_000000000000_0000000000007

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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.197
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.16
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.10
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p6
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.3
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.3
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p3
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 150.0.7871.128, chromium 148.0.7778.96, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|3:0:0:256|m,a,s,p2
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0704
4:47+17:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0649
4:49+15:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0640
4:50+14:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0611
4:48+16:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0574
4:44+20:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0532
4:51+13:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0531
4:45+19:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0515
4:43+21:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0464
4:42+22:0:1412:65535,6:mss,sok,ts,nop,ws:df,id+:0341

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36263
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36259
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36257
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36254
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36248
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36246
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36245
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36244
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36243
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36243

Country

fingerprintco-occurrences
BR · Brazil1528
AR · Argentina751
PK · Pakistan428
MX · Mexico374
MA · Morocco258
KE · Kenya219
AZ · Azerbaijan219
VE · Venezuela194
ZA · South Africa183
EC · Ecuador177

Network (ASN)

fingerprintco-occurrences
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM198
AS8151 · Uninet S.A. de C.V.180
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A.165
AS7303 · Telecom Argentina S.A.160
AS9541 · Cyber Internet Services (Pvt) Ltd.132
AS8193 · Uzbektelekom Joint Stock Company104
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.99
AS28573 · Claro NXT Telecomunicacoes Ltda89
AS36947 · Telecom Algeria87
AS8167 · V tal82