TCP SYN (p0f)
4:48+16:0:1240:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0
first seen 2026-09-12 09:08 · last seen 2026-09-12 09:08 · JSON
Decomposed attributes
| IP version | 4 |
|---|
| Initial TTL | 48+16 |
|---|
| Options length | 0 |
|---|
| MSS | 1240 |
|---|
| 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)
| fingerprint | co-occurrences |
|---|
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
TCP SYN (JA4T)
User-Agent
Country
| fingerprint | co-occurrences |
|---|
LT · Lithuania | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|
AS399498 · Private Networks Labs LLC | 2 |
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).