V6NetHandle: NET6-2604-2C00-1 OrgID: INFOWE Parent: NET6-2600-1 NetName: INFOWEST NetRange: 2604:2C00:: - 2604:2C00:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11071 RegDate: 2010-06-18 Updated: 2012-03-20 TechHandle: IIA5-ARIN AbuseHandle: INA4-ARIN NOCHandle: INO9-ARIN Source: ARIN OrgID: INFOWE OrgName: InfoWest, Inc. CanAllocate: Street: 435 E. Tabernacle City: St. George State/Prov: UT Country: US PostalCode: 84770 RegDate: 1994-06-14 Updated: 2018-01-26 ReferralServer: rwhois://rwhois.infowest.com:4321 OrgTechHandle: IIA5-ARIN OrgAdminHandle: IIA5-ARIN OrgNOCHandle: INO9-ARIN OrgAbuseHandle: INA4-ARIN 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.