Traceroute from Level 3 sites:
Traceroute allows a user to follow a packet through the network to a specific destination. It shows the domain, IP address, and the roundtrip packet times for three successive probes as it traces the route to a specified destination.

Ping from Level 3 sites:
Packet InterNet Groper; This tool can be used to show whether or not a device with a valid internet address or domain name can return packets sent to it by a specified Level 3 PING server.

BGP table query from Level 3 sites:
This tool shows the BGP routing table used for a given route on the Level 3 network.

Whois query:
This tool allows users to find contact information for the administrator(s) of a specific domain.