How to Finding IP Address Range

While small websites may have a single IP address, big players such as Google, Facebook and  Microsoft  have  a  range  of  IP  addresses  allocated  to  their  company  for  hosting additional  websites  and  servers.  This  range  of  information  can  be  obtained  from  the official website of American Registry for Internet Numbers (ARIN). The URL for the ARIN website is listed below:
ARIN Website: https://www.arin.net/

Visit  the  above  URL  and  insert  the  IP address  of  any  given  website  in  the  “Search
Whois” box found at the top right corner of the web page.

READ