TCP SYN (JA4T)

64800_2-4-8_1440_00

first seen 2026-08-26 07:42 · last seen 2026-11-01 23:23 · JSON

Last 7 days (167 observations)

Distinct clients per day (last 30 days, peak 25/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

TCP window64800
Option kinds2-4-8
MSS1440
Window scale00

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
t12i130500_2d7513195f68_e51b7354d87f452

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_000000000000452

TCP SYN (p0f)

fingerprintco-occurrences
6:52+12:0:1440:mss*45,0:mss,sok,ts:flow:0141
6:48+16:0:1440:mss*45,0:mss,sok,ts:flow:0112
6:47+17:0:1440:mss*45,0:mss,sok,ts:flow:095
6:51+13:0:1440:mss*45,0:mss,sok,ts:flow:072
6:53+11:0:1440:mss*45,0:mss,sok,ts:flow:025
6:46+18:0:1440:mss*45,0:mss,sok,ts:flow:03
6:56+8:0:1440:mss*45,0:mss,sok,ts:flow:02
6:49+15:0:1440:mss*45,0:mss,sok,ts:flow:01
6:50+14:0:1440:mss*45,0:mss,sok,ts:flow:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 13_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36452

Country

fingerprintco-occurrences
US · United States452

Network (ASN)

fingerprintco-occurrences
AS63949 · Akamai Connected Cloud452

TLS supported groups

fingerprintco-occurrences
0017,0018,0019428