TCP SYN (p0f)

6:50+14:0:1426:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn,flow:0

first seen 2026-08-17 09:17 · last seen 2026-08-17 09:17 · 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 version6
Initial TTL50+14
Options length0
MSS1426
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
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
t13d1615h2_86a278354501_9f01999177601

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr10engb_d353d425b0bb_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:8000000;2:0|7934465|0|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1426_61

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:153.0) Gecko/20100101 Firefox/153.01

Country

fingerprintco-occurrences
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS5607 · Sky UK Limited1