TCP SYN (JA4T)

42340_2-4-8-1-3_1460_7

first seen 2026-07-02 04:11 · last seen 2026-09-20 18:07 · JSON

Decomposed attributes

TCP window42340
Option kinds2-4-8-1-3
MSS1460
Window scale7

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
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.7
t13d1411h1_cbb2034c60b8_e7c2852226513
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1313h2_f57a46bbacb6_9249cab70c771

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn10ruru_d353d425b0bb_000000000000_0000000000007
ge11nr040000_8391bea91fb6_000000000000_0000000000003
ge20nr020000_fb4f949fd323_000000000000_0000000000001
ge20nr13en00_0c2c1d640f3e_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.7
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.1
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1460:mss*29,7:mss,sok,ts,nop,ws:df,id+:05
4:48+16:0:1460:mss*29,7:mss,sok,ts,nop,ws:df,id+:05
4:54+10:0:1460:mss*29,7:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1460:mss*29,7:mss,sok,ts,nop,ws:df,id+:01
4:43+21:0:1460:mss*29,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.07
Mozilla/5.03
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 7_1_2 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Version/7.0 Mobile Safari/537.36 (compatible; Bytespider; https://bytedance.sg.larkoffice.com/docx/K5bxdypulop3IIxrJb0lOjLVgFe)1

Country

fingerprintco-occurrences
NL · Netherlands7
ID · Indonesia3
DE · Germany1
US · United States1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS50053 · VDSka hosting7
AS46042 · Gunadarma University3
AS16509 · Amazon.com, Inc.1
AS3320 · Deutsche Telekom AG1
AS11426 · Charter Communications Inc1