AS18888 ZILLOW, INC.
2620:115:f::/48 - NETBLK6-ZILLO
V6NetHandle: NET6-2620-115-1 OrgID: ZILLO Parent: NET6-2620-1 NetName: NETBLK6-ZILLO NetRange: 2620:115:: - 2620:115:FF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: assignment OriginAS: 18888 Comment: http://www.zillow.com RegDate: 2013-03-12 Updated: 2019-05-20 Source: ARIN OrgID: ZILLO OrgName: ZILLOW, INC. CanAllocate: Street: 1301 Second Avenue, Floor 31 City: Seattle State/Prov: WA Country: US PostalCode: 98101 Comment: http://www.zillow.com email@example.com RegDate: 2005-03-17 Updated: 2018-10-17 OrgTechHandle: JIB10-ARIN OrgTechHandle: DBE78-ARIN OrgTechHandle: CWR29-ARIN OrgTechHandle: CTR42-ARIN OrgTechHandle: BWC8-ARIN OrgNOCHandle: ZILLO-ARIN OrgAdminHandle: DBE78-ARIN OrgAbuseHandle: JIB10-ARIN OrgAbuseHandle: DBE78-ARIN OrgAbuseHandle: BWC8-ARIN Source: ARIN POCHandle: DBE78-ARIN IsRole: N LastName: Beitel FirstName: David Street: 1301 2ND AVE Street: FLOOR 31 City: SEATTLE State/Prov: WA Country: US PostalCode: 98101 RegDate: 2005-03-17 Updated: 2018-10-24 OfficePhone: +1-206-470-7105 Mailbox: firstname.lastname@example.org Source: ARIN POCHandle: ZILLO-ARIN IsRole: Y LastName: Zillow NOC FirstName: Street: 1301 Second Avenue Street: Floor 31 City: Seattle State/Prov: WA Country: US PostalCode: 98101 RegDate: 2006-06-13 Updated: 2018-10-18 OfficePhone: +1-206-470-7175 Mailbox: email@example.com 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.