TCP SYN (JA4T)

5808_2-4-8-1-3_1452_4

first seen 2026-07-05 05:16 · last seen 2026-11-02 03:06 · JSON

Last 7 days (28 observations)

Distinct clients per day (last 30 days, peak 17/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	`5808`
Option kinds	`2-4-8-1-3`
MSS	`1452`
Window scale	`4`

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
`t13d4412h1_fd39b124ee10_58ed7828516f`	3674
`t13d1515h1_8daaf6152771_de4a06bb82e3`	299
`t13d1515h1_8daaf6152771_0a20fe35d3a5`	228
`t13d1516h1_8daaf6152771_1a63afa7c478`	24
`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.	8
`t13d3112h1_e8f1e7e78f70_d41ae481755e`	1
`t13d491200_bd868743f55c_7c76daad20ec` Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.12.The fingerprint page shows the full measured match list. More on the catalog.	1
`t13d1312h1_f57a46bbacb6_ab7e3b40a677`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	3674
`ge11nn13enus_9db22d02e17a_000000000000_000000000000`	410
`ge11nn14enus_4a2973d235de_000000000000_000000000000`	141
`ge20nn15enus_28e542058e45_000000000000_000000000000`	8
`ge11nn040000_66d37a417839_000000000000_000000000000`	1
`ge11nn040000_c41ada48459b_000000000000_000000000000`	1
`ge11nr19dede_9b2be9e37cfb_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.	8

TCP SYN (p0f)

fingerprint	co-occurrences
`4:47+17:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	1111
`4:48+16:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	958
`4:46+18:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	866
`4:45+19:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	633
`4:44+20:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	406
`4:43+21:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	122
`4:42+22:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	50
`4:49+15:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	40
`4:41+23:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	31
`4:51+13:0:1452:mss*4,4:mss,sok,ts,nop,ws:df,id+:0`	13

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36`	54
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36`	53
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36`	48
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36`	43
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36`	43
`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`	43
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36`	42
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.36`	41
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36`	39
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36`	38

Country

fingerprint	co-occurrences
`VN` · Vietnam	4236

Network (ASN)

fingerprint	co-occurrences
`AS45899` · VNPT Corp	4235
`AS7643` · Vietnam Posts and Telecommunications (VNPT)	1

TLS supported groups

fingerprint	co-occurrences
`0a0a,001d,0017,0018`	28
`0a0a,11ec,001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.	6
`0a0a,6399,001d,0017,0018`	2