AS5728 AT&T Services, Inc.
220.127.116.11/24 - ATTSVC
NetHandle: NET-12-55-0-0-1 OrgID: C01822540 Parent: NET-12-0-0-0-1 NetName: ATTSVC NetRange: 18.104.22.168 - 22.214.171.124 NetType: reassignment RegDate: 2007-12-04 Updated: 2007-12-04 Source: ARIN OrgID: C01822540 OrgName: AT&T Worldnet Services CanAllocate: Street: One Corporate Place South City: Piscataway State/Prov: NJ Country: US PostalCode: 08854 RegDate: 2007-12-04 Updated: 2011-03-19 Source: ARIN
IP Addresses in this 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.