TCP SYN (p0f)
4:121+7:0:1343:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0
first seen 2026-07-31 20:34 · last seen 2026-10-24 11:39 · 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
| IP version | 4 |
|---|---|
| Initial TTL | 121+7 |
| Options length | 0 |
| MSS | 1343 |
| Window size | 65535 |
| Window scale | 8 |
| Options layout | mss,nop,ws,nop,nop,sok |
| Quirks | df,id+ |
| Payload class | 0 |
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 |
|---|---|
t13d1410h2_f98f5dc5c741_4c1ab0552904 | 23 |
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. | 8 |
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. | 8 |
t13d1010h2_561a47a994ce_4c1ab0552904 | 3 |
t13d170900_d1c966aaa946_4c1ab0552904 | 1 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:4096;2:0;3:100;4:6291456;5:16384;6:65535|2147418112|1:0:0:220|m,a,s,p | 16 |
1:4096;2:0;3:100;4:6291456;5:16384;6:65535|2147418112|1:0:0:256|m,a,s,p | 8 |
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, +60 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
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, +85 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +26 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 133.0.6943.16, chrome 156.0.8078.48, chrome 150.0.7871.128, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p | 2 |
1:4096;2:0;3:100;4:6291456;5:16384;6:65535|2147418112|3:0:0:220|m,a,s,p | 1 |
1:4096;2:0;3:100;4:6291456;5:16384;6:65535|2147418112|5:0:0:220|m,a,s,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-1-3-1-1-4_1343_8 | 43 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 24 |
GB · United Kingdom | 15 |
FR · France | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS394089 · Google LLC | 43 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0017,0018,001d | 3 |
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. | 1 |