TCP SYN (p0f)

6:44+20:0:1440:mss*45,9:mss,sok,ts,nop,ws:flow:0

first seen 2026-08-01 09:52 · last seen 2026-10-20 22:45 · 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 TTL44+20
Options length0
MSS1440
Window sizemss*45
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t13d3112h1_e8f1e7e78f70_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr04enus_39a3ba4480e8_000000000000_0000000000001
ge20nr04enus_8325a3ce5a12_000000000000_0000000000001
ge11cn06enus_aeac3047b50b_2e841494d698_41606f7ab2621

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_93

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
UA · Ukraine2
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS30860 · Virtual Systems LLC2
AS213520 · Senko Digital LLC1

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00182