TCP SYN (p0f)

6:51+13:0:1400:mss*45,7:mss,sok,ts,nop,ws:flow:0

first seen 2026-06-27 13:06 · last seen 2026-08-26 01:47 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL51+13
Options length0
MSS1400
Window sizemss*45
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t12d130600_2d7513195f68_e51b7354d87f60

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_00000000000058
ge11nr040000_88d30a62b7ad_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1400_758

User-Agent

fingerprintco-occurrences
Mozilla/5.0 zgrab/0.x60

Country

fingerprintco-occurrences
US · United States60

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation60