TCP SYN (p0f)

4:110+18:0:1386:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-10-18 10:45 · last seen 2026-10-18 10:45 · JSON

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 version4
Initial TTL110+18
Options length0
MSS1386
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d201100_2b729b4bf6f3_9e7b989ebec81

HTTP request (JA4H)

fingerprintco-occurrences
po11nn07bg00_7d361e250c48_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1386_81

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.2; arm64) AppleWebKit/537.36 (KHTML, like Gecko) Edge/83.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
AT · Austria1

Network (ASN)

fingerprintco-occurrences
AS9009 · M247 Europe SRL1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1