TCP SYN (JA4T)
65340_2-1-3-1-1-4_1452_8
first seen 2026-08-27 17:07 · last seen 2026-09-05 08:15 · JSON
Distinct clients per day (last 30 days, peak 2/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 | 65340 |
|---|---|
| Option kinds | 2-1-3-1-1-4 |
| MSS | 1452 |
| 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 |
|---|---|
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. | 5 |
t13d1517h2_8daaf6152771_dcad5a053991 | 5 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 1 |
HTTP request (JA4H)
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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 1 |
1:65536;2:0;4:6291456;6:262144;23290:1333059441|15663105|1:1:0:256|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;56042:472544893|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;51818:2310751538|15663105|1:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;51818:2310751538|15663105|3:1:0:220|m,a,s,p | 1 |
1:65536;2:0;4:6291456;6:262144;51818:2310751538|15663105|5:1:0:220|m,a,s,p | 1 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
VN · Vietnam | 7 |
ES · Spain | 4 |
DE · Germany | 1 |
BG · Bulgaria | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS45899 · VNPT Corp | 7 |
AS3352 · TELEFONICA DE ESPANA S.A.U. | 4 |
AS61071 · NETBOX LTD | 1 |
AS9145 · EWE TEL GmbH | 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 |
|---|---|
q13d0312h3_55b375c5d22e_178839b6cec1 | 2 |