TCP SYN (p0f)
4:40+24:0:1460:mss*20,10:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-08-24 22:42 · last seen 2026-10-27 10:14 · JSON
Last 7 days (1 observations)
Distinct clients per day (last 30 days, peak 1/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 | 40+24 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*20 |
| Window scale | 10 |
| Options layout | mss,sok,ts,nop,ws |
| 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 |
|---|---|
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. | 11 |
t13d1313h2_f57a46bbacb6_9249cab70c77 | 4 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn10zh00_06e2da52e592_000000000000_000000000000 | 6 |
ge20nn020000_fb4f949fd323_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
ge20nn10zh00_f058b30e64ca_000000000000_000000000000 | 3 |
ge20nn10zh00_dfc386b48ce4_000000000000_000000000000 | 1 |
ge20nn10zh00_e1b5b4fef504_000000000000_000000000000 | 1 |
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, +60 more.The fingerprint page shows the full measured match list. More on the catalog. | 11 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 4 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
29200_2-4-8-1-3_1460_10 | 15 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
CN · China | 15 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS55960 · Beijing Guanghuan Xinwang Digital | 15 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
6399,001d,0017,0018,0019 | 1 |