TCP SYN (p0f)

6:54+10:0:1440:mss*45,12:mss,nop,nop,sok,nop,ws:flow:0

first seen 2026-09-30 05:19 · last seen 2026-10-04 09:53 · 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 TTL54+10
Options length0
MSS1440
Window sizemss*45
Window scale12
Options layoutmss,nop,nop,sok,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
t13d1611h2_1711a4c0508c_6d021c4c45cd6
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +8 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn05*000_754588453448_000000000000_0000000000002
ge20nn15zhcn_accd953c130e_000000000000_0000000000002
ge20nn15zhcn_aa31bfec5873_000000000000_0000000000002
ge20nn16zhcn_aa6aa512ad54_000000000000_0000000000001
ge20nn17zhcn_47602fdc1579_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;6:262144|10485760|0|m,a,s,p6
2:0;4:262144|458753|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 26.4.0.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-1-4-1-3_1440_128

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/154.0.0.0 Safari/537.366
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
HK · Hong Kong SAR China8

Network (ASN)

fingerprintco-occurrences
AS48266 · Catixs Ltd8