TCP SYN (p0f)

4:249+6:0:1460:26883,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-02 03:34 · last seen 2026-07-05 08:51 · JSON

Decomposed attributes

IP version4
Initial TTL249+6
Options length0
MSS1460
Window size26883
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
t12d8008h1_9cedc1f1428b_046e095b7c4a8

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.4
he11nn030000_fe444ad14866_000000000000_0000000000004

TCP SYN (JA4T)

fingerprintco-occurrences
26883_2-4-8-1-3_1460_78

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Feedspot/1.0 (+https://www.feedspot.com/fs/fetcher; like FeedFetcher-Google)8

Country

fingerprintco-occurrences
US · United States8

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.8