TCP SYN (p0f)

4:120+8:0:1380:mss*47,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-08-21 15:02 · last seen 2026-08-21 15:02 · 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 TTL120+8
Options length0
MSS1380
Window sizemss*47
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d1812h1_85036bcba153_b26ce05bbdd61

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr08enus_33cbba219825_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-1-3-1-1-4_1380_81

User-Agent

fingerprintco-occurrences
Mozlila/5.0 (Linux; Android 7.0; SM-G892A Bulid/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Moblie Safari/537.361

Country

fingerprintco-occurrences
US · United States1

Network (ASN)

fingerprintco-occurrences
AS205467 · Base IP B.V.1