AS1742 Harvard University
188.8.131.52/20 - ATT
NetHandle: NET-12-0-0-0-1 OrgID: ATTW-Z Parent: NET-12-0-0-0-0 NetName: ATT NetRange: 184.108.40.206 - 220.127.116.11 NetType: allocation Comment: For abuse issues contact email@example.com RegDate: 1983-08-23 Updated: 2013-12-19 TechHandle: IAA17-ARIN Source: ARIN OrgID: ATTW-Z OrgName: AT&T Services, Inc. CanAllocate: Street: 200 S. Laurel AVE. City: MIDDLETOWN State/Prov: NJ Country: US PostalCode: 07748 Comment: Contact AT&T Abuse ( firstname.lastname@example.org ) for policy abuse issues. Comment: All policy abuse issues sent to other POCs will be disregarded. RegDate: 2009-12-18 Updated: 2019-07-14 OrgTechHandle: IPSWI-ARIN OrgTechHandle: ICC-ARIN OrgTechHandle: HKO3-ARIN OrgRoutingHandle: JB3310-ARIN OrgAdminHandle: ICC-ARIN OrgAbuseHandle: ATTAB-ARIN Source: ARIN POCHandle: IAA17-ARIN IsRole: Y LastName: IP Address Administration FirstName: Street: Room C3-3A28 Street: 200 S Laurel Ave City: Middletown State/Prov: NJ Country: US PostalCode: 07748 RegDate: 2007-05-18 Updated: 2015-10-28 OfficePhone: +1-732-420-2071 Mailbox: email@example.com Source: ARIN POCHandle: ATTAB-ARIN IsRole: Y LastName: ATT Abuse FirstName: Street: 400 Interpace Parkway City: Parsippany State/Prov: NJ Country: US PostalCode: 07054 RegDate: 2002-09-24 Updated: 2010-06-25 OfficePhone: +1-919-319-8130 Mailbox: firstname.lastname@example.org Source: ARIN POCHandle: ICC-ARIN IsRole: Y LastName: IP Team FirstName: Street: 200 S. Laurel AVE City: MIDDLETOWN State/Prov: NJ Country: US PostalCode: 07748 RegDate: 2002-09-24 Updated: 2018-07-20 OfficePhone: +1-888-613-6330 Mailbox: email@example.com Mailbox: firstname.lastname@example.org Mailbox: email@example.com Mailbox: firstname.lastname@example.org Mailbox: email@example.com Mailbox: firstname.lastname@example.org 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.