TCP SYN (JA4T)

64800_2-1-3-1-1-4_1392_8

first seen 2026-08-06 08:12 · last seen 2026-10-13 15:43 · JSON

Distinct clients per day (last 30 days, peak 3/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 window	`64800`
Option kinds	`2-1-3-1-1-4`
MSS	`1392`
Window scale	`8`

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)

fingerprint	co-occurrences
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	7
`t13d1312h2_f57a46bbacb6_ab7e3b40a677` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +7 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`t12d190800_d83cc789557e_7af1ed941c26`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn13enus_0c2c1d640f3e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.	7
`po11nn07enid_7d361e250c48_000000000000_000000000000`	1
`ge20nn13enus_21630b3f9490_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.	7
`2:0;4:4194304;5:16384;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:46+18:0:1392:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	4
`6:47+17:0:1392:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	2
`6:57+7:0:1392:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	1
`6:53+11:0:1392:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	1
`6:52+12:0:1392:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36`	8
`Jetpack/12.0; WordPress/6.1; http://site62653127.com`	1

Country

fingerprint	co-occurrences
`BR` · Brazil	6
`PH` · Philippines	2
`ID` · Indonesia	1

Network (ASN)

fingerprint	co-occurrences
`AS8167` · V tal	3
`AS9299` · Philippine Long Distance Telephone Company	2
`AS28573` · Claro NXT Telecomunicacoes Ltda	1
`AS7738` · V tal	1
`AS63859` · PT. Eka Mas Republik	1
`AS264366` · EVALDO SOUSA CARVALHO-ME	1