TCP SYN (JA4T)

42780_2-4-8-1-3_1380_10

first seen 2026-07-30 10:23 · last seen 2026-08-07 03:38 · JSON

Decomposed attributes

TCP window	`42780`
Option kinds	`2-4-8-1-3`
MSS	`1380`
Window scale	`10`

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
`t13d3112h2_e8f1e7e78f70_b26ce05bbdd6` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.	11
`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.	6
`t13d2014h2_a09f3c656075_14788d8d241b`	4

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn040000_c6bfc298f9f7_000000000000_000000000000`	10
`ge20nn13engb_0c2c1d640f3e_000000000000_000000000000`	4
`ge20nn07enus_39faa4ed05e7_000000000000_000000000000`	4
`ge20nn13engb_9519c2577190_000000000000_000000000000`	2
`ge20nn020000_5594a17e7e7e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;4:4194304;5:16384;6:10485760\|1073741824\|0\|m,a,s,p`	10
`4:2097152;3:100\|10485760\|1:0:0:255\|m,s,p,a`	3
`1:65536;2:0;4:6291456;6:262144\|15663105\|3:1:0:256\|m,a,s,p`	2
`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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|13:1:0:256\|m,a,s,p`	1
`3:100;4:10485760;2:0\|1048510465\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.	1
`1:65536;2:0;4:6291456;6:262144\|15663105\|5:1:0:256\|m,a,s,p`	1
`4:2097152;3:100\|10485760\|7:0:0:255\|m,s,p,a`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:58+6:0:1380:mss*31,10:mss,sok,ts,nop,ws:df,id+:0`	21

User-Agent

fingerprint	co-occurrences
`curl/8.5.0`	11
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36`	6
`Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_16 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6.2 Mobile/15E148 Safari/604.1`	4

Country

fingerprint	co-occurrences
`SG` · Singapore	17
`GB` · United Kingdom	4

Network (ASN)

fingerprint	co-occurrences
`AS396982` · Google LLC	21