TCP SYN (p0f)

6:42+22:0:1220:mtu*19,7:mss,sok,ts,nop,ws::0

first seen 2026-06-26 03:44 · last seen 2026-08-20 17:03 · 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 version6
Initial TTL42+22
Options length0
MSS1220
Window sizemtu*19
Window scale7
Options layoutmss,sok,ts,nop,ws
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_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.2
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d3613h1_bcee18a5b459_ecd0401ec68b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn060000_133cb2a8d257_000000000000_0000000000002
ge20nr12enus_46db4d499210_000000000000_0000000000001
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
he11nn050000_27c3a796f72e_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.2

TCP SYN (JA4T)

fingerprintco-occurrences
24320_2-4-8-1-3_1220_73

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.6668.100 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.362
FirmableBot/1.0 (domain-check)1

Country

fingerprintco-occurrences
US · United States4
IN · India1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC5