TCP SYN (JA4T)

42340_2-4-8-1-3_1412_11

first seen 2026-07-19 16:27 · last seen 2026-10-20 21:37 · 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 window42340
Option kinds2-4-8-1-3
MSS1412
Window scale11

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
t13i170900_5b57614c22b0_78e6aca7449b2
t13d3112h1_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.3.1, +12 more.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
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.2
ge11nn070000_f1c095c421c4_000000000000_0000000000001
ge11nn050000_7426b1434792_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1412:mss*29,11:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1412:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1412:mss*29,11:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.362

Country

fingerprintco-occurrences
NL · Netherlands2
DE · Germany1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS215439 · PLAY2GO INTERNATIONAL LIMITED4

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.2