TCP SYN (p0f)

4:45+19:0:1380:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-12 07:17 · last seen 2026-08-21 17:07 · 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
MSS1380
Window size65535
Window scale8
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
t13d2014h2_a09f3c656075_14788d8d241b1
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn07enus_39faa4ed05e7_000000000000_0000000000001
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:2097152;3:100|10485760|1:0:0:255|m,s,p,a1
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1380_83

User-Agent

fingerprintco-occurrences
curl/8.5.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_16 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6.2 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
CN · China2
PY · Paraguay1

Network (ASN)

fingerprintco-occurrences
AS56042 · China Mobile communications corporation2
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A.1