TCP SYN (p0f)

4:45+19:0:1440:16384,6:mss,nop,nop,sok,nop,ws,nop,nop,ts:df,id+:0

first seen 2026-08-17 20:00 · last seen 2026-08-17 20:00 · 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
MSS1440
Window size16384
Window scale6
Options layoutmss,nop,nop,sok,nop,ws,nop,nop,ts
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
t13d1315h2_b79993c66afd_a54fffd0eb619

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12enus_a72b71f519fc_000000000000_0000000000008
ge20nn12enus_a72b71f519fc_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:60306;2:0;4:128882;5:16384|12517377|3:0:0:42|m,p,a,s2
1:60306;2:0;4:128882;5:16384|12517377|5:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|7:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|9:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|11:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|13:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|15:0:0:42|m,p,a,s1
1:60306;2:0;4:128882;5:16384|12517377|17:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
16384_2-1-1-4-1-3-1-1-8_1440_69

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6.2 Safari/605.1.159

Country

fingerprintco-occurrences
PL · Poland9

Network (ASN)

fingerprintco-occurrences
AS199319 · Voice-Net Sp. z o.o.9