TCP SYN (p0f)

4:57+7:0:1240:24704,7:mss,sok,ts,nop,ws:df:0

first seen 2026-07-04 09:44 · last seen 2026-08-19 15:39 · 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 TTL57+7
Options length0
MSS1240
Window size24704
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf
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
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.9

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_be0d0b335e46_000000000000_0000000000009

TCP SYN (JA4T)

fingerprintco-occurrences
24704_2-4-8-1-3_1240_79

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Claude-User/1.0; +claude-user@anthropic.com)9

Country

fingerprintco-occurrences
US · United States9

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC9