AS701 MCI Communications Services, Inc. d/b/a Verizon Business
2620:90:c000::/48 - CITYOFBUFFALO
V6NetHandle: NET6-2620-90-C000-1 OrgID: CB-295 Parent: NET6-2620-1 NetName: CITYOFBUFFALO NetRange: 2620:90:C000:: - 2620:90:C000:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment RegDate: 2014-09-05 Updated: 2014-09-05 Source: ARIN OrgID: CB-295 OrgName: City of Buffalo CanAllocate: Street: 1201 City Hall City: Buffalo State/Prov: NY Country: US PostalCode: 14201 RegDate: 2014-07-03 Updated: 2014-07-03 OrgTechHandle: BARON21-ARIN OrgNOCHandle: BARON21-ARIN OrgAdminHandle: BARON21-ARIN OrgAbuseHandle: BARON21-ARIN Source: ARIN POCHandle: BARON21-ARIN IsRole: N LastName: Barone FirstName: Peter Street: 1201 City Hall City: Buffalo State/Prov: NY Country: US PostalCode: 14201 RegDate: 2014-07-02 Updated: 2017-07-18 OfficePhone: +1-716-851-4883 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.