TCP SYN (p0f)

6:110+18:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:ecn,flow:0

first seen 2026-08-15 21:32 · last seen 2026-08-26 07:33 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL110+18
Options length0
MSS1440
Window sizemss*45
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksecn,flow
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
t13d131300_f57a46bbacb6_fb48f8b98a296
t13d141100_cbb2034c60b8_e5728521abd42
t13d1712h1_ab0a1bf427ad_8e6e362c5eac1
t12d180700_4b22cbed5bed_f28add8e7af01

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr180000_96e223db5b4c_000000000000_0000000000006
ge11nr06enus_acd98d69ca0d_000000000000_0000000000001
ge11nn06enus_acd98d69ca0d_000000000000_0000000000001
po11nn10enus_cf15262463ed_000000000000_0000000000001
he11nn020000_d5c75abc5c2c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-3-1-1-4_1440_810

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.362
Go-http-client/1.11
curl/8.5.01
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 Chrome/122.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 Chrome/124.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
IT · Italy9
US · United States1

Network (ASN)

fingerprintco-occurrences
AS212271 · Cinzia Tocci trading as Lumanex Srl9
AS8075 · Microsoft Corporation1