AS11758 IRIS Networks
2607:f920::/32 - IRIS-V6-NET1
V6NetHandle: NET6-2607-F920-1 OrgID: TITGL Parent: NET6-2600-1 NetName: IRIS-V6-NET1 NetRange: 2607:F920:: - 2607:F920:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF NetType: allocation OriginAS: 11758 Comment: 24/7 NOC - 877-685-0643 RegDate: 2009-04-17 Updated: 2012-09-07 AbuseHandle: ABUSE3516-ARIN TechHandle: ABUSE3516-ARIN NOCHandle: ABUSE3516-ARIN Source: ARIN OrgID: TITGL OrgName: IRIS Networks CanAllocate: Street: 211 Commerce Street Street: Suite 610 City: Nashville State/Prov: TN Country: US PostalCode: 37201 Comment: 24/7 NOC - 877-685-0643 RegDate: 2006-11-29 Updated: 2017-01-28 OrgAbuseHandle: ABUSE3516-ARIN OrgNOCHandle: ABUSE3516-ARIN OrgTechHandle: ABUSE3516-ARIN OrgAdminHandle: HUTCH112-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.