NetHandle: NET-66-209-0-0-1 OrgID: ATTMO-3 Parent: NET-66-0-0-0-0 NetName: ATT-MOBILITY-LLC-66-209-0-0 NetRange: 126.96.36.199 - 188.8.131.52 NetType: allocation Comment: ADDRESSES WITHIN THIS BLOCK ARE NON-PORTABLE RegDate: 2001-12-21 Updated: 2012-03-20 Source: ARIN OrgID: ATTMO-3 OrgName: AT&T Mobility LLC CanAllocate: Street: 1025 Lenox Park Blvd NE Street: 5th Floor City: Atlanta State/Prov: GA Country: US PostalCode: 30319-5309 Comment: For policy abuse issues contact: email@example.com Comment: Send all legal requests to: Comment: ATT National Compliance Center Comment: 11760 US Hwy 1, Suite 600 Comment: North Palm Beach, FL 33408 Comment: Phone Number: 1-800-635-6840 Comment: Fax Number: 1-888-938-4715 Comment: Email: firstname.lastname@example.org RegDate: 2008-10-10 Updated: 2017-11-30 OrgTechHandle: CINGU-ARIN OrgAbuseHandle: CINGU-ARIN OrgTechHandle: IPADM2-ARIN OrgAdminHandle: MWE117-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.