YouBot

The wire fingerprints traffic claiming to be this crawler presented, split by whether a channel the operator publishes for verification — its IP ranges or forward-confirmed reverse DNS — confirmed the claim.

Claims in window

Same adjudication as the stats page: a claim confirmed by either channel the operator publishes — its IP ranges or forward-confirmed reverse DNS — is verified; one confirmed by neither is unverified. Operators differ in which channels they offer, and either alone fully identifies. Sources count distinct clients, not traffic. Fingerprint windows below are day-granular, like sources.

observationssourcesverifiedunverifiedunverified rate
250555500.0%

Fingerprints presented by confirmed traffic

The highest-volume fingerprints the operator's own traffic runs, per signal — claims confirmed via operator-published channels. A Match pill marks an exact match against a controlled capture — an association with known stacks, not an identity verdict: unrelated clients built on the same stack can legitimately share a fingerprint.

TLS ClientHello (JA4)

fingerprintobservations
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. 295

HTTP request (JA4H)

fingerprintobservations
ge11nn080000_4e3e811ee70f_000000000000_000000000000 263
ge11nn050000_be0d0b335e46_000000000000_000000000000 32

TCP SYN (JA4T)

fingerprintobservations
62727_2-4-8-1-3_1460_7 295

TCP SYN (p0f)

fingerprintobservations
4:116+12:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0 225
4:112+16:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0 70