TCP SYN (p0f)

4:113+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-09-19 15:33 · last seen 2026-10-21 06:57 · 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 TTL113+15
Options length0
MSS1460
Window sizemss*44
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
t13d591000_a33745022dd6_5ac7197df9d25
t13d3714h1_91ec122131b4_97a66a8f4cb14

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_e3a9885793ad_000000000000_0000000000005
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_79

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.365
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:132.0) Gecko/20100101 Firefox/132.04

Country

fingerprintco-occurrences
US · United States9

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.9

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,00181