There are two formats of the data available which are updated daily:
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The CSV format which contain more details: https://raw.githubusercontent.com/jhassine/server-ip-addresses/master/data/datacenters.csv
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The text format which contain only the CIDR block: https://raw.githubusercontent.com/jhassine/server-ip-addresses/master/data/datacenters.txt
The list currenlty includes the following cloud infrastructure providers: AWS, Azure, GCP and CloudFlare.
If you want to contribute to add more known server IP addresses, please send a pull request.
Some hints might be gathered here: https://securitytrails.com/blog/identify-ip-ranges-company-owns