inetnum: 201.54.128/19 aut-num: AS28623 abuse-c: ADP45 owner: PONTIFICIA UNIVERSID CATOLICA DO RIO GRANDE DO SUL ownerid: 088.630.413/0002-81 responsible: Milton Sperry Winckler Junior country: BR owner-c: ADP45 tech-c: ADP45 inetrev: 201.54.128/19 nserver: galheta.pucrs.br nsstat: 20161114 AA nslastaa: 20161114 nserver: tapera.pucrs.br nsstat: 20161114 AA nslastaa: 20161114 created: 20051214 changed: 20051214 nic-hdl-br: ADP45 person: Administracao de Dominios - PUCRS e-mail: email@example.com created: 20000411 changed: 20140328
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.