TCP SYN (p0f)
4:100+28:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0
first seen 2026-07-23 12:43 · last seen 2026-09-16 00:59 · JSON
Last 7 days (1 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 | 100+28 |
| Options length | 0 |
| MSS | 1440 |
| 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 |
|---|---|
t13d201100_2b729b4bf6f3_36bf25f296df | 26 |
t13d1812h1_85036bcba153_d41ae481755e | 5 |
t13d181100_85036bcba153_d41ae481755e | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn16enus_a27292610b04_000000000000_000000000000 | 20 |
ge11nn010000_4a823118b9ba_000000000000_000000000000 | 6 |
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.21.3, wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn060000_a284f3d85baf_000000000000_000000000000 | 2 |
po11nr10enus_af6b54c809f5_000000000000_000000000000 | 1 |
ge11nn06enus_a89d28968959_000000000000_000000000000 | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-1-3-1-1-4_1440_8 | 32 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
IT · Italy | 19 |
SE · Sweden | 7 |
NO · Norway | 5 |
CH · Switzerland | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS8075 · Microsoft Corporation | 32 |