AS12008 NeuStar, Inc.
2610:a1:30fd::/48 - SIP-IX
V6NetHandle: NET6-2610-A0-1 OrgID: NEUS Parent: NET6-2610-1 NetName: SIP-IX NetRange: 2610:A0:: - 2610:A7:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2006-06-21 Updated: 2012-03-02 Source: ARIN OrgID: NEUS OrgName: NeuStar, Inc. CanAllocate: Street: 45980 Center Oak Plaza Street: Network Operations Center City: Sterling State/Prov: VA Country: US PostalCode: 20166 Comment: NPAC RegDate: 2001-03-21 Updated: 2018-01-10 OrgTechHandle: NETWO336-ARIN OrgAdminHandle: NETWO336-ARIN OrgAbuseHandle: NETWO336-ARIN Source: ARIN POCHandle: NETWO336-ARIN IsRole: Y LastName: Network Engineering FirstName: Street: 45980 Loudon Tech Center Street: Building 8 City: Sterling State/Prov: VA Country: US PostalCode: 20166 RegDate: 2003-08-21 Updated: 2018-10-31 OfficePhone: +1-866-638-6622 Mailbox: email@example.com Mailbox: firstname.lastname@example.org 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.