AS11853 Internap Corporation
2600:c11::/32 - PNAP-IPV6-02-2009
V6NetHandle: NET6-2600-C00-1 OrgID: IC-1425 Parent: NET6-2600-1 NetName: PNAP-IPV6-02-2009 NetRange: 2600:C00:: - 2600:C14:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation RegDate: 2010-02-02 Updated: 2018-11-29 Source: ARIN OrgID: IC-1425 OrgName: Internap Corporation CanAllocate: Street: 250 Williams Street Street: Suite E100 City: Atlanta State/Prov: GA Country: US PostalCode: 30303 RegDate: 2018-11-09 Updated: 2018-12-03 OrgAdminHandle: INO3-ARIN OrgAbuseHandle: INO3-ARIN OrgNOCHandle: INO3-ARIN OrgTechHandle: INO3-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.