The “Whois” tool can query IP addresses, hostnames, network prefixes, or AS Numbers.
The following valid values can be entered in the search box:
- Hostname: fully qualified domain name, e.g: “domain.com”
- IP: valid IP address, e.g: “10.20.30.40”
- IP Block: any valid prefix, in CIDR format, e.g: “10.20.30.40/24”
- ASN: valid ASN, using the following format: “AS1234”
Figure 3.9.6: Whois
