Use the AS Network WHOIS utility to look up the organisation responsible for an AS network.
Use the IP WHOIS utility to look up the assigned owner, abuse and technical contacts for an IP address or range.
Use the Open Port Checker to check if a TCP port is open and accessible from the general Internet.
Use the Ping utility to check if a host is alive and accessible from the Internet.
Examine the "hops" between the Solid Dev Tools server and an IP address or hostname endpoint, in either IPv4 or IPv6.
Use the What Is My IP? tool to lookup your current IP address - IPv4, IPv6 or both.