Mojeek
Mojeek publishes a JSON file of MojeekBot IP prefixes. The bot respects robots.txt and limits crawl rate to one page per second. Verify with rDNS: legitimate MojeekBot IPs resolve to *.mojeek.com hostnames.
Autonomous systems
Network background
MojeekBot currently operates from a small UK-based address range. The official JSON is the authoritative source.