TCP SYN (JA4T)
65535_2-1-3-1-1-8-4-0-0_1276_6
first seen 2026-07-23 09:30 · last seen 2026-08-02 11:38 · JSON
Decomposed attributes
| TCP window | 65535 |
|---|
| Option kinds | 2-1-3-1-1-8-4-0-0 |
|---|
| MSS | 1276 |
|---|
| Window scale | 6 |
|---|
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)
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. | 3 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|
4:40+24:0:1276:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0 | 3 |
4:51+13:0:1276:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0 | 2 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|
LV · Latvia | 3 |
IN · India | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|
AS1257 · Tele2 Sverige AB | 3 |
AS45609 · Bharti Airtel Ltd. AS for GPRS Service | 2 |
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).