TCP SYN (p0f)

4:112+16:0:1412:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-25 14:18 · last seen 2026-07-25 14:18 · JSON

Decomposed attributes

IP version4
Initial TTL112+16
Options length0
MSS1412
Window sizemss*44
Window scale7
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
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
64240_2-4-8-1-3_1412_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3409.631 Safari/537.361

Country

fingerprintco-occurrences
CR · Costa Rica1

Network (ASN)

fingerprintco-occurrences
AS11830 · Instituto Costarricense de Electricidad y Telecom.1