TCP SYN (JA4T)
64240_2-4-8-1-3_1460_11
first seen 2026-06-29 23:11 · last seen 2026-10-31 19:23 · JSON
Last 7 days (7160 observations)
Distinct clients per day (last 30 days, peak 45/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 window | 64240 |
|---|---|
| Option kinds | 2-4-8-1-3 |
| MSS | 1460 |
| Window scale | 11 |
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)
| fingerprint | co-occurrences |
|---|---|
t13d311000_8ae6a2f5ac15_5ac7197df9d2 | 115611 |
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. | 46 |
t13d1616h2_86a278354501_eeeea6562960 | 28 |
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. | 13 |
t13d1516h2_8daaf6152771_eeeea6562960 | 9 |
t12i570500_2a2bed94251f_a1e935682795 | 7 |
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
t13d3013h2_1d37bd780c83_8537cf56674e | 7 |
t13d1512h2_8daaf6152771_cbb9361b6bf9 | 4 |
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. | 3 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_be0d0b335e46_000000000000_000000000000 | 115611 |
ge20nn04enus_989c7cc05c9b_000000000000_000000000000 | 36 |
ge20nn12zhcn_c0858481ddaa_000000000000_000000000000 | 26 |
ge20nn11zhcn_3901d4197baf_000000000000_000000000000 | 14 |
ge20nr10zhcn_b3034183f430_000000000000_000000000000 | 12 |
ge20nr12zhcn_54b4638ab28b_000000000000_000000000000 | 8 |
ge20nr09zhcn_bfc092dff6c6_000000000000_000000000000 | 8 |
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. | 7 |
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 7 |
ge20nn020000_e5a56608905c_000000000000_000000000000 | 6 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p | 36 |
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. | 28 |
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:42|m,p,a,s | 16 |
1:4096;2:0;4:32768;5:16384|12517377|5:0:0:22|m,p,a,s | 9 |
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. | 7 |
3:100;4:33554432;2:0|33488897|0|m,p,s,a Match?Exact match in Thumbprint's published controlled catalog captures: php-curl 7.88.1, curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p | 6 |
1:4096;2:0;4:32768;5:16384|12517377|3:0:0:22|m,p,a,s | 5 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p | 5 |
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 4 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 115628 |
ID · Indonesia | 87 |
NO · Norway | 39 |
NL · Netherlands | 7 |
BR · Brazil | 6 |
DE · Germany | 2 |
CH · Switzerland | 2 |
NZ · New Zealand | 2 |
GB · United Kingdom | 1 |
PL · Poland | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS209366 · SEMrush CY LTD | 115611 |
AS45102 · Alibaba (US) Technology Co., Ltd. | 87 |
AS56655 · Gigahost AS | 39 |
AS174 · Cogent Communications, LLC | 7 |
AS265393 · FIRENET SERVIÇOS DE TELECOMUNICAÇÕES LTDA | 6 |
AS47172 · Greenhost BV | 4 |
AS396362 · Leaseweb USA, Inc. | 3 |
AS27411 · Leaseweb USA, Inc. | 3 |
AS51852 · Private Layer INC | 2 |
AS30633 · Leaseweb USA, Inc. | 2 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,001e,0019,0018 | 20330 |
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. | 8 |
0017,0019,001c,001b,0018,001a,0016,000e,000d,000b,000c,0009,000a | 7 |
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. | 1 |
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. | 1 |