TCP SYN (JA4T)

64860_2-4-8-1-3_1380_7

first seen 2026-06-29 23:15 · last seen 2026-09-11 07:46 · JSON

Last 7 days (16 observations)

Distinct clients per day (last 30 days, peak 2/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	`64860`
Option kinds	`2-4-8-1-3`
MSS	`1380`
Window scale	`7`

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
`t13d131100_f57a46bbacb6_ab7e3b40a677` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.	27
`t13d1516h2_8daaf6152771_e5627efa2ab1`	11
`t13d4312h1_c7886603b240_b26ce05bbdd6`	10
`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.	9
`t13d1713h1_ab0a1bf427ad_ecd0401ec68b` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	8
`t13d5212h1_b262b3658495_8e6e362c5eac` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.20.0, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`t13d2014h2_a09f3c656075_14788d8d241b`	2
`t13d1516h1_8daaf6152771_d8a2da3f94cd`	2
`t13d5911h1_a33745022dd6_1f22a2ca17c4` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 23.11.1.The fingerprint page shows the full measured match list. More on the catalog.	1
`t13d3013h1_1d37bd780c83_8537cf56674e`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn05enus_f3bb7aa45ec4_000000000000_000000000000`	27
`ge20nr07enus_3a51d8071d5f_000000000000_000000000000`	8
`ge11nn06enus_7eb5f6c8ec48_000000000000_000000000000`	7
`ge11nn06ja00_fb4afd1f380a_000000000000_000000000000`	5
`he11nn06ja00_fb4afd1f380a_000000000000_000000000000`	5
`ge20nn04enus_39a3ba4480e8_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.	4
`ge20nn09enus_a545420ec371_000000000000_000000000000`	3
`ge20nr13enus_0c2c1d640f3e_000000000000_000000000000`	3
`ge11nn07*000_131b6413da1e_000000000000_000000000000`	2
`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, +22 more.The fingerprint page shows the full measured match list. More on the catalog.	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:1048576;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.0, go-net/http 1.27.1.The fingerprint page shows the full measured match list. More on the catalog.	8
`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, +42 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:65536;3:1000;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p`	3
`1:65536;3:1000;4:6291456;6:262144\|15663105\|13:1:0:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|15:1:0:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|11:1:9:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|9:1:0:220\|m,a,s,p`	2
`1:65536;4:131072;5:16384\|12517377\|3:0:0:201,5:0:0:101,7:0:0:1,9:0:7:1,11:0:3:1,13:0:0:241,15:0:13:42\|m,p,a,s`	1
`1:65536;2:0;4:6291456;6:262144\|15663105\|0\|m,a,s,p`	1
`2:0;3:100;4:2097152;9:1\|10420225\|1:1:0:256\|m,s,a,p`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:51+13:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	26
`4:50+14:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	12
`6:46+18:0:1380:mss*47,7:mss,sok,ts,nop,ws:flow:0`	10
`4:55+9:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	8
`4:52+12:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:54+10:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	6
`4:53+11:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	4
`4:48+16:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	3
`4:47+17:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	2
`4:46+18:0:1380:mss*47,7:mss,sok,ts,nop,ws:df,id+:0`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36`	27
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.36`	9
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`	7
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.4942.274 Safari/537.36`	5
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.4074.221 Safari/537.36`	5
`Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.1`	4
`Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/118.1 Mobile/15E148 Safari/605.1.15`	4
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36`	3
`Mozilla/5.0`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36`	2

Country

fingerprint	co-occurrences
`US` · United States	35
`NL` · Netherlands	17
`JP` · Japan	16
`RU` · Russia	5
`GB` · United Kingdom	4
`DE` · Germany	2
`NO` · Norway	1
`AT` · Austria	1

Network (ASN)

fingerprint	co-occurrences
`AS62651` · Strong Technology, LLC.	34
`AS47674` · Net Solutions - Consultoria Em Tecnologias De Informacao, Sociedade Unipessoal LDA	16
`AS2516` · KDDI CORPORATION	10
`AS40663` · IncogNet LLC	5
`AS25532` · LLC MASTERHOST	5
`AS174` · Cogent Communications, LLC	3
`AS30081` · CacheFly	2
`AS42831` · UK Dedicated Servers Limited	2
`AS56655` · Gigahost AS	1
`AS396356` · Latitude.sh	1

fingerprint	co-occurrences
`2:0;4:4194304;5:1048576;6:10485760\|1073741824\|0\|a,m,p,s` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.27.0, go-net/http 1.27.1.The fingerprint page shows the full measured match list. More on the catalog.	8
`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, +42 more.The fingerprint page shows the full measured match list. More on the catalog.	4
`1:65536;3:1000;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p`	3
`1:65536;3:1000;4:6291456;6:262144\|15663105\|13:1:0:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|15:1:0:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|11:1:9:220\|m,a,s,p`	2
`1:65536;3:1000;4:6291456;6:262144\|15663105\|9:1:0:220\|m,a,s,p`	2
`1:65536;4:131072;5:16384\|12517377\|3:0:0:201,5:0:0:101,7:0:0:1,9:0:7:1,11:0:3:1,13:0:0:241,15:0:13:42\|m,p,a,s`	1
`1:65536;2:0;4:6291456;6:262144\|15663105\|0\|m,a,s,p`	1
`2:0;3:100;4:2097152;9:1\|10420225\|1:1:0:256\|m,s,a,p`	1