User-Agent

Bun/1.4.3

first seen 2026-10-18 15:52 · last seen 2026-10-18 16:48 · JSON

Distinct clients per day (last 30 days, peak 4/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

Browser / client	`Bun 1.4.3`
Note	`inferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above`

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)

fingerprint	co-occurrences
`t13d1713h1_5b57614c22b0_6a3d802a7139`	12
`t13d1811h1_5d04281c6031_78e6aca7449b`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn050000_ecbf4e651318_000000000000_000000000000`	9
`ge11nr040000_e1d2031bdfea_000000000000_000000000000`	4

TCP SYN (p0f)

fingerprint	co-occurrences
`4:119+9:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	13

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-4_1460_8`	13

Country

fingerprint	co-occurrences
`HK` · Hong Kong SAR China	13

Network (ASN)

fingerprint	co-occurrences
`AS9269` · Hong Kong Broadband Network Ltd.	13

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	13