TCP SYN (p0f)

4:110+18:0:1452:65535,8:mss,nop,ws,sok,ts:df,id+:0

first seen 2026-08-27 03:19 · last seen 2026-08-27 03:19 · 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 TTL110+18
Options length0
MSS1452
Window size65535
Window scale8
Options layoutmss,nop,ws,sok,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
t13d2913h1_723694b0fccc_5671b5df50292

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11frbe_835281d8e5d9_000000000000_0000000000001
ge11nn11frbe_835281d8e5d9_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-4-8_1452_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.12

Country

fingerprintco-occurrences
BE · Belgium2

Network (ASN)

fingerprintco-occurrences
AS5432 · Proximus NV2