TCP SYN (p0f)
4:122+6:0:1420:mss*46,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0
first seen 2026-06-30 12:27 · last seen 2026-09-16 09:05 · JSON
Last 7 days (6 observations)
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 | 122+6 |
| Options length | 0 |
| MSS | 1420 |
| Window size | mss*46 |
| Window scale | 8 |
| Options layout | mss,nop,ws,nop,nop,sok |
| Quirks | df,id+,ecn |
| 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 |
|---|---|
t13d1411h2_cbb2034c60b8_e7c285222651 | 34 |
t12d860600_e18388e7f3a3_a1e935682795 | 13 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr020000_fb4f949fd323_000000000000_000000000000 | 34 |
ge11nn06enus_ff6fe191b79d_000000000000_000000000000 | 13 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 34 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65320_2-1-3-1-1-4_1420_8 | 47 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 38 |
NL · Netherlands | 5 |
BE · Belgium | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS396982 · Google LLC | 47 |