AS12008 NeuStar, Inc.
2001:418:1409::/48 - NTTA-IPV6-0
V6NetHandle: NET6-2001-418-1 OrgID: NTTAM-1 Parent: NET6-2001-400-0 NetName: NTTA-IPV6-0 NetRange: 2001:418:: - 2001:418:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation Comment: Comment: Reassignment information for this block is Comment: available at rwhois.gin.ntt.net port 4321 RegDate: 2000-05-24 Updated: 2012-03-02 Source: ARIN OrgID: NTTAM-1 OrgName: NTT America, Inc. CanAllocate: Street: 8300 E Maplewood Ave. Street: Suite 400 City: Greenwood Village State/Prov: CO Country: US PostalCode: 80111 RegDate: 2005-12-08 Updated: 2018-10-17 ReferralServer: rwhois://rwhois.gin.ntt.net:4321 OrgAdminHandle: VIPAR-ARIN OrgAbuseHandle: NAAC-ARIN OrgNOCHandle: NASC-ARIN OrgTechHandle: PHILI70-ARIN OrgTechHandle: VIPAR-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.