TCP SYN (JA4T)

65535_2-1-3-1-1-4_1448_8

first seen 2026-07-30 15:09 · last seen 2026-08-30 19:01 · 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 window65535
Option kinds2-1-3-1-1-4
MSS1448
Window scale8

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
t13d2913h1_723694b0fccc_5671b5df50291
t13d1713h1_ab0a1bf427ad_ecd0401ec68b Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11itit_835281d8e5d9_000000000000_0000000000001
ge11nn040000_50034e570378_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:112+16:0:1448:65535,8:mss,nop,ws,nop,nop,sok:df,id+:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 13_4_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.199 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 16_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
ID · Indonesia1
IT · Italy1

Network (ASN)

fingerprintco-occurrences
AS1267 · WIND TRE S.P.A.1
AS23679 · PT. Media Antar Nusa1