TCP SYN (JA4T)
64240_2-1-3-4-8_1460_8
first seen 2026-07-04 01:17 · last seen 2026-10-25 11:04 · JSON
Last 7 days (1 observations)
Distinct clients per day (last 30 days, peak 6/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 | 2-1-3-4-8 |
| MSS | 1460 |
| Window scale | 8 |
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 |
|---|---|
t13d2913h1_723694b0fccc_5671b5df5029 | 14 |
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. | 9 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 7 |
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. | 4 |
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
t12d210700_76e208dd3e22_f28add8e7af0 | 3 |
t13d3013h2_1d37bd780c83_8537cf56674e | 2 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 2 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t12d2109h1_76e208dd3e22_7af1ed941c26 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr11ruru_835281d8e5d9_000000000000_000000000000 | 9 |
ge20nr16ruru_94fdc06e0694_000000000000_000000000000 | 7 |
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 5 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 4 |
ge11nn11ruru_835281d8e5d9_000000000000_000000000000 | 4 |
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +13 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nr12zhcn_54b4638ab28b_000000000000_000000000000 | 2 |
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 2 |
ge20nn16ruru_94fdc06e0694_000000000000_000000000000 | 2 |
ge20nr13ruru_9e2b86631664_000000000000_000000000000 | 2 |
HTTP/2 frames (Akamai)
| fingerprint | co-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. | 11 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|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. | 3 |
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. | 2 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
RU · Russia | 35 |
CN · China | 3 |
LT · Lithuania | 3 |
US · United States | 2 |
JP · Japan | 1 |
KR · South Korea | 1 |
UA · Ukraine | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8402 · PJSC "Vimpelcom" | 18 |
AS209605 · UAB Host Baltic | 3 |
AS4808 · China Unicom Beijing Province Network | 3 |
AS39927 · E-Light-Telecom Ltd. | 3 |
AS42683 · JSC ER-Telecom Holding | 3 |
AS31257 · Orion Telecom LLC | 2 |
AS12389 · PJSC Rostelecom | 1 |
AS4766 · Korea Telecom | 1 |
AS34602 · MEGASVYAZ LLC | 1 |
AS42610 · OJSC National Cable Networks | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0a0a,001d,0017,0018 | 4 |
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. | 3 |
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. | 2 |
0a0a,6399,001d,0017,0018 | 1 |
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).
| fingerprint | linked observations |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 2 |
q13d0312h3_55b375c5d22e_178839b6cec1 | 1 |