AS23393 NuCDN LLC
2610:1c8:b::/48 - NUCDN-IPV6
V6NetHandle: NET6-2610-1C8-1 OrgID: NL-564 Parent: NET6-2610-1 NetName: NUCDN-IPV6 NetRange: 2610:1C8:: - 2610:1C8:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 23393 RegDate: 2007-04-13 Updated: 2018-06-20 Source: ARIN OrgID: NL-564 OrgName: NuCDN LLC CanAllocate: Street: 1255 Broad St Street: Suite 100 City: Clifton State/Prov: NJ Country: US PostalCode: 07013 RegDate: 2018-04-24 Updated: 2018-06-21 OrgTechHandle: PR516-ARIN OrgAdminHandle: PR516-ARIN OrgAbuseHandle: PR516-ARIN Source: ARIN POCHandle: PR516-ARIN IsRole: N LastName: Rosenthal FirstName: Phil Street: 1255 Broad Street City: Clifton State/Prov: NJ Country: US PostalCode: 07013 RegDate: 2002-02-15 Updated: 2018-11-29 OfficePhone: +1-212-812-9060 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.