|ASN||AS14618 Amazon.com, Inc.|
V6NetHandle: NET6-2600-1F00-1 OrgID: AMAZO-4 Parent: NET6-2600-1 NetName: AMZ-EC2 NetRange: 2600:1F00:: - 2600:1FFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 16509 RegDate: 2014-10-17 Updated: 2014-10-17 Source: ARIN OrgID: AMAZO-4 OrgName: Amazon.com, Inc. CanAllocate: Street: Amazon Web Services, Inc. Street: P.O. Box 81226 City: Seattle State/Prov: WA Country: US PostalCode: 98108-1226 Comment: For details of this service please see Comment: http://ec2.amazonaws.com/ RegDate: 2005-09-29 Updated: 2017-01-28 OrgAdminHandle: IPMAN40-ARIN OrgNOCHandle: AANO1-ARIN OrgAbuseHandle: AEA8-ARIN OrgTechHandle: ANO24-ARIN Source: ARIN
Netblocks are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a 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.