2800:ad0::/32 - EDT2
inetnum: 2800:ad0::/32 status: allocated owner: SetarNet city: Oranjestad country: AW owner-c: EDT2 tech-c: EDT2 abuse-c: EDT2 created: 2011-10-24 changed: 2011-10-24 source: LACNIC
IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.
Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.