TCP SYN (p0f)
4:55+9:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:id-,ecn:0
first seen 2026-06-25 11:40 · last seen 2026-06-26 03:46 · JSON
Decomposed attributes
| IP version | 4 |
|---|
| Initial TTL | 55+9 |
|---|
| Options length | 0 |
|---|
| MSS | 1460 |
|---|
| Window size | 65535 |
|---|
| Window scale | 6 |
|---|
| Options layout | mss,nop,ws,nop,nop,ts,sok,eol+1 |
|---|
| Quirks | 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)
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|
2:0;3:100;4:2097152;8:1;9:1|10420225|1:0:0:256|m,s,a,p | 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 26.5, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
2:0;3:100;4:2097152;9:1|10420225|1:0:0:256|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|
US · United States | 5 |
Network (ASN)
| fingerprint | co-occurrences |
|---|
AS21554 · Wisconsin CyberLynk Network, Inc. | 5 |
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).