TCP SYN (p0f)

4:45+19:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-19 20:58 · last seen 2026-10-17 19:14 · 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 TTL45+19
Options length0
MSS1340
Window sizemss*48
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
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1713h1_5b57614c22b0_6a3d802a71391

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn14enus_186438911b7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 149.0.7827.53, chrome 149.0.7827.155, chromium 149.0.7827.102, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn06enus_caba6ee6695d_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64320_2-4-8-1-3_1340_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
curl/8.01

Country

fingerprintco-occurrences
ID · Indonesia1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS21859 · Zenlayer Inc1
AS50304 · Blix Solutions AS1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1