TCP SYN (p0f)

6:51+13:0:1440:mss*30,10:mss,sok,ts,nop,ws:flow:0

first seen 2026-07-22 14:37 · last seen 2026-09-12 05:47 · JSON

Decomposed attributes

IP version6
Initial TTL51+13
Options length0
MSS1440
Window sizemss*30
Window scale10
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
t13d190900_9dc949149365_97f8aa674fd92
t13d191000_9dc949149365_e7c2852226511

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_e1d2031bdfea_000000000000_0000000000002
ge11nr040000_8391bea91fb6_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
43200_2-4-8-1-3_1440_103

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; CensysInspect/1.1; +https://about.censys.io/)2
vantage-agent/0.11

Country

fingerprintco-occurrences
HK · Hong Kong SAR China2
US · United States1

Network (ASN)

fingerprintco-occurrences
AS398722 · Censys, Inc.2
AS20473 · The Constant Company, LLC1