TCP SYN (p0f)

4:45+19:0:1424:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-09 14:21 · last seen 2026-10-03 06:35 · 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
MSS1424
Window sizemss*44
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.7
t13i170900_5b57614c22b0_78e6aca7449b4

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn15enus_a80081d13d36_000000000000_0000000000007
ge11nn070000_d0d63ed74832_000000000000_0000000000001
ge11nn050000_c71bbc472f37_000000000000_0000000000001
ge11nn070000_7f45aea3de95_000000000000_0000000000001
ge11nn050000_710ce6c79cd7_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.7

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1424_711

User-Agent

fingerprintco-occurrences
Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)7
libredtail-http4

Country

fingerprintco-occurrences
CN · China11

Network (ASN)

fingerprintco-occurrences
AS4837 · CHINA UNICOM China169 Backbone7
AS45090 · Shenzhen Tencent Computer Systems Company Limited4