User-Agent

Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/)

first seen 2026-07-10 05:12 · last seen 2026-10-30 15:02 · JSON

Bot verification

This User-Agent declares a bot or user-triggered fetcher. Each connection's IP is checked at ingest against the verification channels the operator publishes — its crawler IP ranges and, where documented, forward-confirmed reverse DNS. A claim either channel confirms is verified; one confirmed by neither — outside the ranges, inside a different operator's, or failing the DNS check — is unverified. Meta publishes its network rather than crawler ranges, so its verified claims are network-confirmed and its unconfirmed misses are unverified claims, not proven spoofs. Telegram publishes network ranges rather than fetcher ranges, and its misses are treated the same way. bot-claim anomalies →

claims	verified	unverified	unverified rate
SeznamBot	214	0	0.0%

Last 7 days (53 observations)

Distinct clients per day (last 30 days, peak 12/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	`SeznamBot 4.0`
Device class	`bot`
Declared URL	`https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/`
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
`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.	769
`t13d3112h1_1d947a95fc68_fa269c3d986d`	117
`t13d3113h1_1d947a95fc68_7e1102d2036b`	38

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn07cscz_62ad33df7c0a_000000000000_000000000000`	643
`ge11nn06cscz_f604b96915d0_000000000000_000000000000`	94
`ge11nn07cscz_d4021d63333c_000000000000_000000000000`	92
`ge11nn06cscz_fcadf6bdaa82_000000000000_000000000000`	66
`ge11nn06cscz_a9e98b5c162a_000000000000_000000000000`	29

TCP SYN (p0f)

fingerprint	co-occurrences
`6:43+21:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	407
`6:44+20:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	210
`6:42+22:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	126
`6:45+19:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	73
`6:46+18:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	56
`6:47+17:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	38
`6:41+23:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	13
`6:40+24:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64800_2-4-8-1-3_1440_10`	924

Country

fingerprint	co-occurrences
`CZ` · Czechia	924

Network (ASN)

fingerprint	co-occurrences
`AS43037` · Seznam.cz, a.s.	924

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019,001e,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31.The fingerprint page shows the full measured match list. More on the catalog.	127