TCP SYN (p0f)
4:48+16:0:1412:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0
first seen 2026-09-16 00:50 · last seen 2026-10-01 05:08 · JSON
Decomposed attributes
| IP version | 4 |
|---|
| Initial TTL | 48+16 |
|---|
| Options length | 0 |
|---|
| MSS | 1412 |
|---|
| Window size | 65535 |
|---|
| Window scale | 6 |
|---|
| Options layout | mss,nop,ws,nop,nop,ts,sok,eol+1 |
|---|
| Quirks | df,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)
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (JA4T)
User-Agent
Country
| fingerprint | co-occurrences |
|---|
CN · China | 4 |
Network (ASN)
| fingerprint | co-occurrences |
|---|
AS4134 · CHINANET BACKBONE | 4 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).