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2620:103::/48 - CML-32
V6NetHandle: NET6-2620-103-1 OrgID: UL-111 Parent: NET6-2620-1 NetName: CML-32 NetRange: 2620:103:: - 2620:103:7:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2011-03-23 Updated: 2015-03-19 Source: ARIN OrgID: UL-111 OrgName: UBM LLC CanAllocate: Street: 1983 Marcus Ave. Street: Suit 250 City: Lake Success State/Prov: NY Country: US PostalCode: 11042 RegDate: 2015-03-16 Updated: 2019-06-06 OrgTechHandle: VRETT-ARIN OrgTechHandle: JASON40-ARIN OrgTechHandle: BRUNN44-ARIN OrgNOCHandle: VRETT-ARIN OrgNOCHandle: JASON40-ARIN OrgNOCHandle: BRUNN44-ARIN OrgAdminHandle: VRETT-ARIN OrgAbuseHandle: VRETT-ARIN OrgAbuseHandle: JASON40-ARIN OrgAbuseHandle: BRUNN44-ARIN Source: ARIN POCHandle: VRETT-ARIN IsRole: N LastName: Vrettos FirstName: Loukas Street: 2 Penn Plaza Street: 15th Floor City: New York State/Prov: NY Country: US PostalCode: 10121 RegDate: 2015-04-01 Updated: 2019-06-04 OfficePhone: +1-212-400-3147 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.