TCP SYN (p0f)

4:41+23:0:1400:65535,8:mss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws:df:0

first seen 2026-07-25 15:11 · last seen 2026-07-30 04:57 · JSON

Decomposed attributes

IP version4
Initial TTL41+23
Options length0
MSS1400
Window size65535
Window scale8
Options layoutmss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws
Quirksdf
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
t13d4412h1_fd39b124ee10_58ed7828516f2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1400_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil2

Network (ASN)

fingerprintco-occurrences
AS26599 · TELEFÔNICA BRASIL S.A2