TCP SYN (p0f)

4:49+15:0:1446:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0

first seen 2026-09-29 12:33 · last seen 2026-09-29 12:33 · JSON

Decomposed attributes

IP version4
Initial TTL49+15
Options length0
MSS1446
Window size65535
Window scale6
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
t12d380500_10ed599f3404_67a080e8974e1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_5b1e8b5f4d2d_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1446_61

User-Agent

fingerprintco-occurrences
Mozilla/5.01

Country

fingerprintco-occurrences
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS5607 · Sky UK Limited1