SeznamBot/4.0
GoodBotCommunity-sourcedSeznamBot is the web crawler used by Seznam.cz, a prominent Czech search engine. Its primary function is to systematically browse the internet, indexing content to enhance search result relevance. The user agent string for SeznamBot/4.0 is: This string identifies SeznamBot/4.0 to web servers. The crawler adheres to the robots.txt standard, allowing website owners to control which parts of their site are accessible to bots. For instance, to prevent SeznamBot from accessing the entire site, a website's robots.txt file would include: Additionally, SeznamBot recognizes non-standard directives in the robots.txt file, such as the Allow directive, which explicitly permits access to specific URLs. For example, to allow SeznamBot to access only the /A/ directory and its subdirectories, while disallowing the /A/B/ subdirectory, the robots.txt file would contain: SeznamBot also supports the Request-rate directive, enabling website owners to specify the number of documents SeznamBot can download within a given time period, helping to prevent server overload. For example, to allow SeznamBot to download up to 10 documents per minute, the robots.txt file would include: For more detailed information on controlling SeznamBot's crawling behavior, you can refer to Seznam's official documentation. ( napoveda.seznam.cz ) Operated by Seznam.cz.
What is SeznamBot/4.0?
SeznamBot is the dedicated web crawler operated by Seznam.cz, a major Czech internet company. It systematically traverses the web to gather data for the Seznam search engine, ensuring that websites are discoverable by users in the Czech Republic and surrounding regions. The bot is highly transparent, providing detailed documentation, IP ranges, and PTR records to allow site administrators to verify its identity and manage its activity.
Identification
How we rated this bot
Identifies itself honestly, and we found no credible reports of abuse.
What we read
- AI Web Crawler Bots Gone Wild! e.g. ClaudeBot, DotBot, PetalBot
- google ignoring robots.txt ? - Google Search Central Community
- Why are Bing and SEMRushBot ignoring crawl-delay in my robots.txt ...
- Control bots, spiders, and crawlers - DreamHost Knowledge Base
- Meta Has New Web-Crawling Bots That Sneakily Get Around Robots.txt - Business Insider
Why it crawls your site
SeznamBot crawls the internet to build and maintain the index for the Seznam.cz search engine. By retrieving page content, it enables the search engine to provide relevant results to users. The operator provides clear instructions for site owners to identify the bot via its User-Agent string and reverse DNS lookups, and it supports the IndexNow protocol to allow for more efficient, real-time content updates.
IP ranges
Requests from SeznamBot/4.0 originate from these published ranges. For strict verification, match the source IP against this list in addition to checking the user-agent and reverse-DNS.
Block or allow SeznamBot/4.0
Add a Disallow rule for Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/) in your robots.txt file. You can also block at the server level using your web server configuration or CDN firewall rules to filter requests matching the user-agent string.
# Block SeznamBot/4.0 from crawling your entire site User-agent: Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/) Disallow: / # Allow SeznamBot/4.0 full access User-agent: Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/) Allow: /
Ensure your robots.txt allows Mozilla/5.0 (compatible; SeznamBot/4.0; +https://o-seznam.cz/napoveda/vyhledavani/en/seznambot-crawler/). Verify requests by checking the user-agent string.
Traffic & trends
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Data sources
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