TCP SYN (p0f)

4:240+15:0:1390:mss*20,6:mss,nop,ws,sok,ts:df,id+:0

first seen 2026-07-25 13:41 · last seen 2026-07-25 13:41 · JSON

Decomposed attributes

IP version4
Initial TTL240+15
Options length0
MSS1390
Window sizemss*20
Window scale6
Options layoutmss,nop,ws,sok,ts
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
t13d4412h1_fd39b124ee10_58ed7828516f1

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.1

TCP SYN (JA4T)

fingerprintco-occurrences
27800_2-1-3-4-8_1390_61

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.93 Safari/537.361

Country

fingerprintco-occurrences
HR · Croatia1

Network (ASN)

fingerprintco-occurrences
AS5391 · Croatian Telecom Inc.1