TCP SYN (JA4T)

35424_2-4-8-1-3_1460_7

first seen 2026-07-28 12:15 · last seen 2026-11-01 20:25 · JSON

Last 7 days (2754 observations)

Distinct clients per day (last 30 days, peak 92/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 window35424
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
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28.The fingerprint page shows the full measured match list. More on the catalog.20076
t13d181100_85036bcba153_d41ae481755e2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn09enus_a1a0096bef8e_000000000000_00000000000019705
ge20nn09enus_11021b20a09b_000000000000_000000000000195
ge20nn09enus_d6ebfc2f6ac9_000000000000_000000000000176
ge11nn040000_5b1e8b5f4d2d_000000000000_0000000000001
ge11nn050000_ea6f06182064_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.13.5, rust-reqwest 0.13.4, +4 more.The fingerprint page shows the full measured match list. More on the catalog.20076

TCP SYN (p0f)

fingerprintco-occurrences
4:57+7:0:1460:35424,7:mss,sok,ts,nop,ws:df,id+:020019
4:53+11:0:1460:35424,7:mss,sok,ts,nop,ws:df,id+:021
4:56+8:0:1460:35424,7:mss,sok,ts,nop,ws:df,id+:018
4:54+10:0:1460:35424,7:mss,sok,ts,nop,ws:df,id+:012
4:55+9:0:1460:35424,7:mss,sok,ts,nop,ws:df,id+:08

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Reflectionbot/1.0; +https://reflection.ai/bot) Chrome/151.0.0.0 Safari/537.3620076
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0 Safari/537.362

Country

fingerprintco-occurrences
US · United States20078

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC20078

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.10625