Whois Details
inetnum: 201.37.0.0/16 aut-num: AS28573 abuse-c: GRSVI owner: CLARO S.A. ownerid: 40.432.544/0835-06 responsible: CLARO S.A. owner-c: GRSVI tech-c: GRSVI inetrev: 201.37.0.0/18 nserver: ns7.virtua.com.br nsstat: 20170303 AA nslastaa: 20170303 nserver: ns8.virtua.com.br nsstat: 20170303 AA nslastaa: 20170303 inetrev: 201.37.64.0/18 nserver: ns7.virtua.com.br nsstat: 20170304 AA nslastaa: 20170304 nserver: ns8.virtua.com.br nsstat: 20170304 AA nslastaa: 20170304 inetrev: 201.37.128.0/18 nserver: ns7.virtua.com.br nsstat: 20170307 AA nslastaa: 20170307 nserver: ns8.virtua.com.br nsstat: 20170307 AA nslastaa: 20170307 inetrev: 201.37.192.0/18 nserver: ns7.virtua.com.br nsstat: 20170307 AA nslastaa: 20170307 nserver: ns8.virtua.com.br nsstat: 20170307 AA nslastaa: 20170307 created: 20050615 changed: 20151020 nic-hdl-br: GRSVI person: Grupo de Segurança Vírtua created: 20080512 changed: 20090518
IP address subranges within this IP range
Details
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.