AS19406 Towerstream I, Inc.
2604:f400:2800::/37 - TWRS
V6NetHandle: NET6-2604-F400-1 OrgID: TOWER-20 Parent: NET6-2600-1 NetName: TWRS NetRange: 2604:F400:: - 2604:F400:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 19406 RegDate: 2010-07-19 Updated: 2016-01-04 Source: ARIN OrgID: TOWER-20 OrgName: Towerstream I, Inc. CanAllocate: Street: 55 Hammerlund Way Street: TECH II City: Middletown State/Prov: RI Country: US PostalCode: 02842 RegDate: 2007-05-08 Updated: 2017-01-28 OrgTechHandle: ZC208-ARIN OrgNOCHandle: ZC208-ARIN OrgAdminHandle: ZC208-ARIN OrgAbuseHandle: ZC208-ARIN OrgAbuseHandle: ABUSE615-ARIN Source: ARIN POCHandle: ZC208-ARIN IsRole: Y LastName: Towerstream Corporation FirstName: Street: 55 Hammerlund Way Street: TECH II City: Middletown State/Prov: RI Country: US PostalCode: 02842 RegDate: 2002-05-28 Updated: 2019-04-01 OfficePhone: +1-401-848-5848 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.