Censys and LeakIX are a couple options, both providing search capabilities without registering and a bit more functionality upon free registration:

Censys.io example: https://search.censys.io – ‘ip: [10.1.0.129 to 10.1.0.140]’ or ‘ip: 10.1.0.128/25’

Example IP Range Search on Censys

LeakIX.net example: https://leakix.net “Service” – ip:”10.1.0.128

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Mostly, they seek out vulnerabilities, detect attacks, and eliminate compromises. Of course, the size of the attack surface and the sheer volume of vulnerabilities, attacks, and compromises means organizations must make tough choices; not everything gets fixed, stopped, recovered, and so forth. There will need to be some form of acceptable (tolerab

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