TCP SYN (JA4T)
65535_2-1-3-4-8_1460_8
first seen 2026-07-01 14:32 · last seen 2026-10-30 12:40 · JSON
Last 7 days (5 observations)
Distinct clients per day (last 30 days, peak 5/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 | 65535 |
|---|---|
| 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 |
|---|---|
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 156.0.8078.48, chrome 154.0.8037.57, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 136 |
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. | 115 |
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. | 24 |
t13d2913h1_723694b0fccc_5671b5df5029 | 19 |
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 8 |
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. | 5 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 5 |
t13d1410h2_f98f5dc5c741_8846e450cd95 | 5 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 4 |
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
RU · Russia | 292 |
SG · Singapore | 15 |
IE · Ireland | 11 |
NL · Netherlands | 5 |
FR · France | 5 |
US · United States | 4 |
UA · Ukraine | 2 |
NO · Norway | 1 |
KR · South Korea | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS35807 · SkyNet Ltd. | 257 |
AS4773 · MobileOne Ltd. Mobile/Internet Service Provider Singapore | 12 |
AS41230 · ASK4 Limited | 11 |
AS12389 · PJSC Rostelecom | 5 |
AS15557 · Societe Francaise Du Radiotelephone - SFR SA | 5 |
AS1136 · KPN B.V. | 5 |
AS8402 · PJSC "Vimpelcom" | 5 |
AS34602 · MEGASVYAZ LLC | 3 |
AS9506 · Singtel Fibre Broadband | 3 |
AS51645 · JSC ER-Telecom Holding | 3 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog. | 44 |
0a0a,001d,0017,0018 | 7 |
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 158.0.1, firefox 157.0, firefox 157.0.1, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 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 | 3 |