TCP SYN (p0f)

4:52+12:0:1400:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-20 23:37 · last seen 2026-08-20 23:37 · 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 TTL52+12
Options length0
MSS1400
Window sizemss*46
Window scale10
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
t13d1515h2_1f9c1ec88692_a54fffd0eb614

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_016d87568c43_000000000000_0000000000004

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:139264;2:0;4:121760;5:16384|12517377|3:0:0:42|m,p,a,s1
1:139264;2:0;4:121760;5:16384|12517377|5:0:0:42|m,p,a,s1
1:139264;2:0;4:121760;5:16384|12517377|7:0:0:42|m,p,a,s1
1:139264;2:0;4:121760;5:16384|12517377|9:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
64400_2-4-8-1-3_1400_104

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.364

Country

fingerprintco-occurrences
CA · Canada4

Network (ASN)

fingerprintco-occurrences
AS5645 · TekSavvy Solutions, Inc.4