TCP SYN (p0f)

4:116+12:0:1460:8192,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-09-12 06:21 · last seen 2026-09-12 06:21 · JSON

Last 7 days (36 observations)

Distinct clients per day (last 30 days, peak 11/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 TTL116+12
Options length0
MSS1460
Window size8192
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
t13d1518h2_8daaf6152771_4980c97edce021
t13d081300_b8c177e1861e_89e9e4bb341914
t13d311200_1d947a95fc68_7e1102d2036b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn13enus_e66716e13e58_000000000000_00000000000019
he11nn040000_0f808c53fce6_000000000000_00000000000010
ge11nn040000_0f808c53fce6_000000000000_0000000000004
ge20nr12enus_f8a3a1e39dc3_000000000000_0000000000002
he11nn09enus_d49d79236001_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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.5
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p4
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p3
1:65536;2:0;4:6291456;6:262144|15663105|13:1:0:256|m,a,s,p3
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|15:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
8192_2-4-8-1-3_1460_936

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; HubSpot Crawler; +https://www.hubspot.com) Chrome/131.0.0.0 Safari/537.3635
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 (compatible; HubSpot DataHub; +https://www.hubspot.com)1

Country

fingerprintco-occurrences
US · United States36

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.36