User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/156.0.0.0 Safari/537.36

first seen 2026-10-26 20:08 · last seen 2026-10-29 12:56 · JSON

Last 7 days (5 observations)

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	`Headless Chrome 156.0.0.0`
Operating system	`Windows 10.0`
Device class	`bot`
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
`t13d1517h2_8daaf6152771_cb7bf5808d99` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog.	5

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn13zhcn_0c2c1d640f3e_000000000000_000000000000`	5

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:256\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.	5

TCP SYN (p0f)

fingerprint	co-occurrences
`4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:112+16:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1
`4:54+10:0:1460:29184,7:mss,sok,ts,nop,ws::0`	1
`6:50+14:0:1440:mss*20,7:mss,sok,ts,nop,ws::0`	1
`6:50+14:0:1420:mss*46,8:mss,nop,ws,nop,nop,sok:flow:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	1
`64240_2-1-3-1-1-4_1440_8`	1
`65320_2-1-3-1-1-4_1420_8`	1
`29184_2-4-8-1-3_1460_7`	1
`28800_2-4-8-1-3_1440_7`	1

Country

fingerprint	co-occurrences
`US` · United States	3
`CN` · China	2

Network (ASN)

fingerprint	co-occurrences
`AS4837` · CHINA UNICOM China169 Backbone	2
`AS906` · DMIT Cloud Services	2
`AS23473` · PAVLOV MEDIA INC	1

TLS supported groups

fingerprint	co-occurrences
`0a0a,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.	5