AS22226 San Francisco Unified School District
220.127.116.11/16 - SFUSD-NET
NetHandle: NET-156-1-0-0-1 OrgID: SFUSD Parent: NET-156-0-0-0-0 NetName: SFUSD-NET NetRange: 18.104.22.168 - 22.214.171.124 NetType: assignment RegDate: 1991-10-29 Updated: 1998-03-19 TechHandle: SH25-ARIN Source: ARIN OrgID: SFUSD OrgName: San Francisco Unified School District CanAllocate: Street: Lowell High School City: San Francisco State/Prov: CA Country: US PostalCode: 94720 RegDate: 1991-10-29 Updated: 2011-09-24 OrgTechHandle: SH25-ARIN OrgAdminHandle: SH25-ARIN OrgAbuseHandle: SH25-ARIN Source: ARIN
IP address subranges within this IP range
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.