TCP SYN (JA4T)

65535_2-4-8-1-3_1412_8

first seen 2026-06-29 23:09 · last seen 2026-09-15 23:14 · JSON

Last 7 days (81 observations)

Distinct clients per day (last 30 days, peak 84/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 scale8

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
t13d181300_e8a523a41297_43ade6aba3df976
t13d4412h1_fd39b124ee10_58ed7828516f547
t13d1515h1_8daaf6152771_de4a06bb82e3236
t13d1515h1_8daaf6152771_0a20fe35d3a5205
t13d1712h2_5b57614c22b0_ef7df7f74e48150
t13d1516h1_8daaf6152771_1a63afa7c47833
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.7
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
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d1515h2_8daaf6152771_e8ed158c4d851

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.549
ge11nn050000_c727097c2f59_000000000000_000000000000432
ge11nn13enus_9db22d02e17a_000000000000_000000000000339
ge11nn080000_6b4f92f3c7df_000000000000_000000000000234
ge11nn070000_5583da70a3c4_000000000000_000000000000152
ge11nn14enus_4a2973d235de_000000000000_000000000000135
ge11nn060000_1726a8486418_000000000000_00000000000079
ge20nr080000_eac7452ad7da_000000000000_00000000000075
ge20nn070000_fad2baeaef05_000000000000_00000000000040
ge11nn060000_a664e4fabf5b_000000000000_00000000000030

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:33554432|25100289|0|m,s,p,a150
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.9
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s1
4:16777216|16711681|0|m,p,a,s1
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:121+7:0:1412:65535,8:mss,sok,ts,nop,ws::01120
4:51+13:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:0110
4:50+14:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:0107
4:49+15:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:0106
4:48+16:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:095
4:47+17:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:078
4:44+20:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:072
4:46+18:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:069
4:45+19:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:064
4:52+12:0:1412:65535,8:mss,sok,ts,nop,ws:df,id+:060

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)442
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.7871.186 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)116
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.7871.128 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)94
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.7922.173 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)78
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Chrome-Lighthouse77
Mozilla/5.0 (Linux; Android 11; moto g power (2022)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Mobile Safari/537.36 Chrome-Lighthouse73
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.3648
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.3641
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.7922.137 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)41
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.3637

Country

fingerprintco-occurrences
US · United States1044
PK · Pakistan256
MX · Mexico139
BR · Brazil114
ZA · South Africa73
KE · Kenya43
AR · Argentina32
NP · Nepal25
BE · Belgium24
EG · Egypt24

Network (ASN)

fingerprintco-occurrences
AS15169 · Google LLC1107
AS9541 · Cyber Internet Services (Pvt) Ltd.76
AS8151 · Uninet S.A. de C.V.75
AS17557 · Pakistan Telecommunication Company Limited37
AS33771 · Safaricom Limited28
AS13999 · Mega Cable, S.A. de C.V.23
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.23
AS36924 · GVA Cote d'Ivoire SAS22
AS36947 · Telecom Algeria21
AS8452 · TE-AS20

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprintlinked observations
q13d0315h3_55b375c5d22e_dc5437974b471