TCP SYN (p0f)

6:111+17:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:ecn,flow:0

first seen 2026-10-13 13:46 · last seen 2026-10-29 14:29 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/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 version6
Initial TTL111+17
Options length0
MSS1440
Window sizemss*45
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksecn,flow
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
t12d180700_4b22cbed5bed_f28add8e7af02

HTTP request (JA4H)

fingerprintco-occurrences
he11nn020000_d5c75abc5c2c_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-3-1-1-4_1440_82

Country

fingerprintco-occurrences
US · United States2

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation2

TLS supported groups

fingerprintco-occurrences
0018,0017 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.7, powershell 5.1.26100.33648, curl 8.21.0.The fingerprint page shows the full measured match list. More on the catalog.1