TCP SYN (p0f)

4:38+26:0:8910:mss*7,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 10:50 · last seen 2026-10-13 12:07 · 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 TTL38+26
Options length0
MSS8910
Window sizemss*7
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
t13d1513h2_8daaf6152771_ff9cead5a15b2
t13d2313h2_24fc43eb1c96_ff9cead5a15b1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn12enus_60f823d07c94_000000000000_0000000000002
ge20nn04enus_139b1bddb874_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:33554432|4128769|0|m,p,a,s3

TCP SYN (JA4T)

fingerprintco-occurrences
62370_2-4-8-1-3_8910_73

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.3 Safari/605.1.151

Country

fingerprintco-occurrences
FR · France3

Network (ASN)

fingerprintco-occurrences
AS16276 · OVH SAS3