TCP SYN (p0f)

4:104+24:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-12 17:07 · last seen 2026-09-03 04:03 · JSON

Distinct clients per day (last 30 days, peak 2/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version4
Initial TTL104+24
Options length0
MSS1440
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
t13d201100_2b729b4bf6f3_36bf25f296df66
t13d181100_85036bcba153_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn16enus_a27292610b04_000000000000_00000000000042
ge11nn010000_4a823118b9ba_000000000000_00000000000016
ge11nn16enus_35f3f038964b_000000000000_0000000000007
ge11nn15enus_35372a7bda31_000000000000_0000000000001
ge11nn06enus_a89d28968959_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_858

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.3650
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil35
PL · Poland22
CH · Switzerland9
KR · South Korea1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation67