TCP SYN (p0f)

4:44+20:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-26 07:52 · last seen 2026-09-10 00:49 · JSON

Last 7 days (5 observations)

Distinct clients per day (last 30 days, peak 4/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 TTL44+20
Options length0
MSS1452
Window sizemss*44
Window scale1
Options layoutmss,sok,ts,nop,ws
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
t13d1515h1_8daaf6152771_0a20fe35d3a57
t13d1515h1_8daaf6152771_de4a06bb82e34

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
ge11nn14enus_4a2973d235de_000000000000_0000000000005

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1452_111

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil4
ID · Indonesia1
TW · Taiwan1
ZA · South Africa1
SA · Saudi Arabia1
PH · Philippines1
VN · Vietnam1
VE · Venezuela1

Network (ASN)

fingerprintco-occurrences
AS26599 · TELEFÔNICA BRASIL S.A2
AS25019 · Saudi Telecom Company JSC1
AS7552 · Viettel Group1
AS3462 · Data Communication Business Group1
AS20011 · Dimension Data1
AS4761 · INDOSAT Internet Network Provider1
AS21826 · Corporación Telemic C.A.1
AS263097 · VN INFRAESTRUTURA DE REDES LTDA.1
AS152107 · Fiberbro Internet Communication Services Corp.1
AS264477 · FLIX FIBRA1