SeznamBot

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
57303000.0%

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
t13d3113h1_1d947a95fc68_7e1102d2036b 38
t13d3112h1_1d947a95fc68_b72e173852fa Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 11.0.31.The fingerprint page shows the full measured match list. More on the catalog. 20

HTTP request (JA4H)

fingerprintobservations
ge11nn07cscz_62ad33df7c0a_000000000000_000000000000 31
ge11nn07cscz_d4021d63333c_000000000000_000000000000 21
ge11nn06cscz_f604b96915d0_000000000000_000000000000 6

TCP SYN (JA4T)

fingerprintobservations
64800_2-4-8-1-3_1440_10 58

TCP SYN (p0f)

fingerprintobservations
6:43+21:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0 25
6:45+19:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0 24
6:41+23:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0 9