TCP SYN (p0f)

4:249+6:0:1460:26883,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-16 17:06 · last seen 2026-09-01 22:19 · 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 TTL249+6
Options length0
MSS1460
Window size26883
Window scale9
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
t13d380900_a22fda9eb1a3_9da38b6fd1bc5

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_a439a7f83178_000000000000_0000000000005

TCP SYN (JA4T)

fingerprintco-occurrences
26883_2-4-8-1-3_1460_95

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.365

Country

fingerprintco-occurrences
US · United States5

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.5