TCP SYN (p0f)

4:50+14:0:1460:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0

first seen 2026-07-01 21:59 · last seen 2026-07-01 21:59 · JSON

Decomposed attributes

IP version4
Initial TTL50+14
Options length0
MSS1460
Window size65535
Window scale5
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf,ecn
Payload class0

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)

fingerprintco-occurrences
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr09engb_9ef6621d46ec_000000000000_0000000000001
ge20nn08engb_abbb35b20271_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;3:100;9:1|10485760|0|m,s,p,a2

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1460_52

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)2

Country

fingerprintco-occurrences
IM · Isle of Man2

Network (ASN)

fingerprintco-occurrences
AS13122 · Manx Telecom Trading Ltd2

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).

fingerprintlinked observations
q13d0311h3_55b375c5d22e_f2a83c8e78ae1