2001:410:2000::/40 - MRNET-1
V6NetHandle: NET6-2001-410-2000-1 OrgID: MRNET-1 Parent: NET6-2001-410-1 NetName: MRNET-1 NetRange: 2001:410:2000:: - 2001:410:20FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reallocation OriginAS: 10965 RegDate: 2003-05-29 Updated: 2016-12-17 TechHandle: RD184-ARIN Source: ARIN OrgID: MRNET-1 OrgName: MRNet CanAllocate: Street: University of Manitoba Street: E3-606 EITC City: Winnipeg State/Prov: MB Country: CA PostalCode: R3T-2N2 Comment: Manitoba Regional Educational network. Comment: http://www.mrnet.mb.ca RegDate: 1998-02-17 Updated: 2013-03-21 OrgTechHandle: DMI51-ARIN OrgAbuseHandle: DMI51-ARIN OrgAdminHandle: DMI51-ARIN OrgTechHandle: RD184-ARIN OrgAbuseHandle: RD184-ARIN 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.