TCP SYN (JA4T)

32120_2-4-8-1-3_1452_7

first seen 2026-09-02 01:36 · last seen 2026-10-22 03:13 · JSON

Distinct clients per day (last 30 days, peak 1/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 window32120
Option kinds2-4-8-1-3
MSS1452
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
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.1
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d131100_f57a46bbacb6_a089bac06eae1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr030000_cd680697de12_000000000000_0000000000001
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.1
ge11nr040000_8391bea91fb6_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1452:mss*22,7:mss,sok,ts,nop,ws:df,id+:03

User-Agent

fingerprintco-occurrences
Go-http-client/1.12
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
UA · Ukraine2
DE · Germany1

Network (ASN)

fingerprintco-occurrences
AS49824 · PC "Astra-net"2
AS8881 · 1&1 Versatel GmbH1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1