TCP SYN (p0f)
4:52+12:0:1460:65535,13:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-11 13:00 · last seen 2026-10-28 03:10 · JSON
Last 7 days (2 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 | 52+12 |
| Options length | 0 |
| MSS | 1460 |
| Window size | 65535 |
| Window scale | 13 |
| 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 |
|---|---|
t13d1312h2_a44d0ee8b3cc_e381dae6da6b | 32 |
t13d1412h2_e33ad33b3d25_6b314db333b6 | 2 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;3:1;4:8388608;5:65536|8323073|0|m,s,a,p | 34 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1460_13 | 31 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 28 |
DK · Denmark | 2 |
DE · Germany | 1 |
SG · Singapore | 1 |
SE · Sweden | 1 |
PL · Poland | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS13335 · Cloudflare, Inc. | 34 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,0018,0019,11ec,6399,fe32 | 5 |