TCP SYN (JA4T)
65535_2-1-3-1-1-4_1339_8
first seen 2026-08-28 14:10 · last seen 2026-08-30 13:34 · JSON
Distinct clients per day (last 30 days, peak 3/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 | 2-1-3-1-1-4 |
| MSS | 1339 |
| 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 | 11 |
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. | 4 |
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. | 4 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:105+23:0:1339:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 14 |
4:107+21:0:1339:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0 | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
LV · Latvia | 14 |
BE · Belgium | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS1257 · Tele2 Sverige AB | 14 |
AS5432 · Proximus NV | 1 |