All, what you need to know about IPs..
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Here is a set of free online tools (ping, traceroute, etc.) for fast
diagnose problems on the network or with specific hosts.
Checks can be carried out from several territorial locations (USA, Canada, Russia) for more informational content
diagnostics.
Ping - is a computer network administration software utility used to test the
reachability of a host on an Internet Protocol (IP) network. It is available for virtually
all operating systems that have networking capability, including most embedded network administration
software.
Ping measures the round-trip time for messages sent from the originating host to a
destination computer that are echoed back to the source.
Ping operates by sending Internet Control Message Protocol (ICMP) echo request packets
to the target host and waiting for an ICMP echo reply. The program reports errors, packet
loss, and a statistical summary of the results, typically including the minimum, maximum,
the mean round-trip times, and standard deviation of the mean.
Traceroute - computer network diagnostic command for displaying possible routes (paths) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection.
Whois - a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block or an autonomous system, but is also used for a wider range of other information.
DNS Records - are instructions that live in authoritative DNS servers and provide information about a domain including what IP address is associated with that domain and how to handle requests for that domain. This is the web-version of the DIG tool.