TCP SYN (p0f)
4:46+18:0:1412:mss*46,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-27 00:39 · last seen 2026-08-30 19:50 · JSON
Distinct clients per day (last 30 days, peak 2/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 | 46+18 |
| Options length | 0 |
| MSS | 1412 |
| Window size | mss*46 |
| Window scale | 7 |
| 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 |
|---|---|
t13i170900_5b57614c22b0_78e6aca7449b | 4 |
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
t13d251000_b78ed14e2fd0_e7c285222651 | 3 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
HTTP request (JA4H)
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64952_2-4-8-1-3_1412_7 | 10 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 8 |
HK · Hong Kong SAR China | 3 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 11 |