TCP SYN (p0f)

4:101+27:0:1380:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-19 16:40 · last seen 2026-07-10 01:06 · JSON

Decomposed attributes

IP version4
Initial TTL101+27
Options length0
MSS1380
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+
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
t12d180700_4b22cbed5bed_2dae41c691ec1
t13d201200_2b729b4bf6f3_e24568c0d4401

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_cf1edba2959c_000000000000_0000000000001
po11nn07enke_7d361e250c48_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1380_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; rv:143.0) Gecko/20100101 Firefox/143.01
Mozilla/5.0 (Windows NT 10.0; x64) AppleWebKit/537.36 (KHTML, like Gecko) Opera/61.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
JP · Japan1
KE · Kenya1

Network (ASN)

fingerprintco-occurrences
AS63949 · Akamai Connected Cloud1
AS33771 · Safaricom Limited1