TCP SYN (p0f)

4:49+15:0:1452:mss*44,1:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-09-04 02:28 · last seen 2026-09-10 14:33 · JSON

Last 7 days (1 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 TTL49+15
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_de4a06bb82e35
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_0000000000006

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1452_16

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil1
ID · Indonesia1
IN · India1
IT · Italy1
BY · Belarus1
CO · Colombia1

Network (ASN)

fingerprintco-occurrences
AS3269 · Telecom Italia S.p.A.1
AS9829 · National Internet Backbone1
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom1
AS3549 · Level 3 Parent, LLC1
AS53078 · Acesse Comunicação Ltda1
AS153092 · PT Redi Revolusi Digital Solusi1