2607:f2b0:420::/48 - NTTDATA-SERVICES-NET-V6
AS10442 Department of Education
V6NetHandle: NET6-2607-F2B0-1 OrgID: DSC-161 Parent: NET6-2600-1 NetName: NTTDATA-SERVICES-NET-V6 NetRange: 2607:F2B0:: - 2607:F2B0:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 1294 RegDate: 2008-01-08 Updated: 2018-07-18 Source: ARIN
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.