AS16509 Amazon.com, Inc.
2600:1f1c::/36 - AMAZON-SFO-V6
V6NetHandle: NET6-2600-1F1C-1 OrgID: AMAZO-48 Parent: NET6-2600-1F00-1 NetName: AMAZON-SFO-V6 NetRange: 2600:1F1C:: - 2600:1F1C:FFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: reallocation OriginAS: 16509 RegDate: 2016-12-16 Updated: 2016-12-16 Source: ARIN OrgID: AMAZO-48 OrgName: Amazon.com, Inc. CanAllocate: Street: 1200 12th Ave South City: Seattle State/Prov: WA Country: US PostalCode: 98144 Comment: The activity you have detected originates from a dynamic hosting environment. Comment: For fastest response, please submit abuse reports at http://aws-portal.amazon.com/gp/aws/html-forms-controller/contactus/AWSAbuse Comment: For more information regarding EC2 see: Comment: http://ec2.amazonaws.com/ Comment: All reports MUST include: Comment: * src IP Comment: * dest IP (your IP) Comment: * dest port Comment: * Accurate date/timestamp and timezone of activity Comment: * Intensity/frequency (short log extracts) Comment: * Your contact details (phone and email) Without these we will be unable to identify the correct owner of the IP address at that point in time. RegDate: 2011-08-11 Updated: 2017-01-28 OrgNOCHandle: AANO1-ARIN OrgAbuseHandle: AEA8-ARIN OrgTechHandle: ANO24-ARIN OrgAdminHandle: IPMAN40-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.