2620:101:b000::/41 - VERIZONWIRELESS-IT-IPV6-DMZ
V6NetHandle: NET6-2620-101-B000-1 OrgID: VERIZ-2 Parent: NET6-2620-1 NetName: VERIZONWIRELESS-IT-IPV6-DMZ NetRange: 2620:101:B000:: - 2620:101:B07F:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 12079 RegDate: 2011-02-08 Updated: 2012-03-02 TechHandle: MC305-ARIN AbuseHandle: MC305-ARIN NOCHandle: MC305-ARIN Source: ARIN OrgID: VERIZ-2 OrgName: Verizon Wireless CanAllocate: Street: 2785 Mitchell Dr Street: Mailstop 11-2 City: Walnut Creek State/Prov: CA Country: US PostalCode: 94598 RegDate: 2003-02-05 Updated: 2011-09-24 OrgTechHandle: TMM3-ARIN OrgTechHandle: MC305-ARIN OrgAbuseHandle: TMM3-ARIN OrgAbuseHandle: MC305-ARIN OrgAdminHandle: MC305-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.