TCP SYN (p0f)

4:56+8:0:1420:mss*30,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:38 · last seen 2026-09-05 23:53 · 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 TTL56+8
Options length0
MSS1420
Window sizemss*30
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
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog.6

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_e5a56608905c_000000000000_0000000000006

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-hyper 1.11.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog.6

TCP SYN (JA4T)

fingerprintco-occurrences
42600_2-4-8-1-3_1420_76

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Discordbot/2.0; +https://discordapp.com)6

Country

fingerprintco-occurrences
US · United States6

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC6