inetnum: 200.3.120/21 status: assigned aut-num: N/A owner: Universidad Nacional de Rosario ownerid: AR-UNRO-LACNIC responsible: Prof. Darío Mairoana address: Maipu, 1065, address: S2000CGK - Rosario - SF country: AR phone: +54 34 1420  owner-c: MFC5 tech-c: MFC5 abuse-c: MFC5 inetrev: 200.3.120/21 nserver: AGATHA.UNR.EDU.AR nsstat: 20170305 AA nslastaa: 20170305 nserver: VALERIA.UNR.EDU.AR nsstat: 20170305 AA nslastaa: 20170305 created: 19950523 changed: 20141001 nic-hdl: MFC5 person: Francisco Pablo Bruno e-mail: telematica@UNR.EDU.AR address: Maipú, 1065, Of. 425 address: 2000 - Rosario - SF country: AR phone: +54 341 420  created: 20100304 changed: 20141001
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.