TCP SYN (p0f)

6:52+12:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0

first seen 2026-09-14 02:31 · last seen 2026-10-23 22:40 · JSON

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

IP version6
Initial TTL52+12
Options length0
MSS1440
Window sizemss*45
Window scale10
Options layoutmss,sok,ts,nop,ws
Quirksflow
Payload class0

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
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.30
t13d171000_5b57614c22b0_78e6aca7449b14
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.9
t13d181000_e8a523a41297_78e6aca7449b8
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.6
t13d3013h2_1d37bd780c83_8537cf56674e3
t13d1513h2_8daaf6152771_eca864cca44a3
t13d3013h1_1d37bd780c83_8537cf56674e3
t12d150700_0707305c9f76_0f3b2bcde21d3
t13d4312h1_c7886603b240_b26ce05bbdd61

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_4ebf34bca547_000000000000_00000000000027
ge11nn030000_58c83775e1a3_000000000000_00000000000022
ge20nr12enus_7f8aecb7bbee_000000000000_00000000000012
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.4
ge20nn030000_bf75ddd0bb29_000000000000_0000000000003
ge20nn14enus_e6dae214b9be_000000000000_0000000000003
ge20nr12enus_df25ac57a18f_000000000000_0000000000003
ge11nn040000_b2e9a2d2ea69_000000000000_0000000000003
ge20nn030000_80b089f68b8e_000000000000_0000000000002
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.2

HTTP/2 frames (Akamai)

fingerprintco-occurrences
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.13
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.9
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 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog.9
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:220|m,a,s,p5
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:220|m,a,s,p5
4:16777216|16711681|0|m,p,a,s4
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3
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.1
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.1
1:65536;2:0;4:6291456;6:262144|15663105|3:1:1:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.128, chrome 150.0.7871.115, chrome 154.0.8037.58, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_1082

User-Agent

fingerprintco-occurrences
Dart/3.13 (dart:io)9
Mozilla/5.0 (Linux; Android 10; K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/145.0.0.0 Mobile Safari/537.369
Dart/2.16 (dart:io)8
Mozilla/5.0 (Linux; Android 16; sdk_gphone64_x86_64 Build/BE2A.250530.026.F3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/133.0.6943.137 Mobile Safari/537.366
dev.fingerprint.probe/1 (Linux; U; Android 16; en_US; sdk_gphone64_x86_64; Build/BE2A.250530.026.F3; Cronet/143.0.7445.0)6
dev.fingerprint.probe/1 (Linux; U; Android 17; en_US; sdk_gphone64_x86_64; Build/CE2A.260420.019; Cronet/141.0.7340.3)6
Dart/3.12 (dart:io)4
curl/8.14.13
Mozilla/5.0 (Linux; Android 15; sdk_gphone64_x86_64 Build/AE3A.240806.043; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/124.0.6367.219 Mobile Safari/537.363
dev.fingerprint.probe/1 (Linux; U; Android 15; en_US; sdk_gphone64_x86_64; Build/AE3A.240806.043; Cronet/141.0.7340.3)3

Country

fingerprintco-occurrences
US · United States75
CA · Canada5
JP · Japan1
RU · Russia1

Network (ASN)

fingerprintco-occurrences
AS132892 · Cloudflare, Inc.52
AS202623 · Cloudflare Inc22
AS16276 · OVH SAS5
AS60068 · Datacamp Limited1
AS26832 · Rica Web Services1
AS42610 · OJSC National Cable Networks1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.3
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.3.1, curl 7.88.1, curl 8.13.0, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1