TCP SYN (p0f)

4:51+13:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:40 · last seen 2026-07-14 05:35 · JSON

Decomposed attributes

IP version4
Initial TTL51+13
Options length0
MSS1460
Window sizemss*44
Window scale9
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
t13d3013h2_1d37bd780c83_8537cf56674e1
t13d1910h1_9dc949149365_97f8aa674fd91

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn040000_fc47e34348bb_000000000000_0000000000001
ge11nn040000_e1d2031bdfea_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.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_1460_92

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:149.0) Gecko/20100101 Firefox/149.01
FreshRSS/1.29.1 (Linux; https://freshrss.org)1

Country

fingerprintco-occurrences
DE · Germany1
CA · Canada1

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC1
AS3209 · Vodafone GmbH1