El comando whois te da mucha información sobre el propietario de un dominio o IP, en el caso de los dominios yo lo uso por ejemplo para saber en que fecha caducan o vencen y las IP publicas para saber a que empresa pertenecen.
Hay varios sitios en Internet donde puedes ejecutar whois, si cuentas con un equipo Linux puedes ejecutarlo de forma mas inmediata desde la linea de comandos.
Para instalarlo en Ubuntu ejecuta el siguiente comando.
Para instalarlo en Fedora ejecuta el siguiente comando.
Para instalarlo en Manjaro ejecuta el siguiente comando.
Utilizando whois con un dominio.
Para obtener información whois de un nombre de dominio basta escribir el comando whois seguido del dominio que quieres analizar.
Obtendras una respuesta parecida a la siguiente.
Domain Name: CNN.COM
Registry Domain ID: 3269879_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.corporatedomains.com
Registrar URL: http://www.cscglobal.com/global/web/csc/digital-brand-services.html
Updated Date: 2018-04-10T16:43:38Z
Creation Date: 1993-09-22T04:00:00Z
Registry Expiry Date: 2026-09-21T04:00:00Z
Registrar: CSC Corporate Domains, Inc.
Registrar IANA ID: 299
Registrar Abuse Contact Email: domainabuse@cscglobal.com
Registrar Abuse Contact Phone: 8887802723
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited
Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited
Name Server: NS-1086.AWSDNS-07.ORG
Name Server: NS-1630.AWSDNS-11.CO.UK
Name Server: NS-47.AWSDNS-05.COM
Name Server: NS-576.AWSDNS-08.NET
DNSSEC: unsignedUtilizando whois con una IP publica
Igual que con el dominio solo hay que agregar al comando whois la IP publica que queremos analizar.
Obtendrás un resultado parecido al siguiente.
NetRange: 205.251.192.0 - 205.251.255.255
CIDR: 205.251.192.0/18
NetName: AMAZON-05
NetHandle: NET-205-251-192-0-1
Parent: NET205 (NET-205-0-0-0-0)
NetType: Direct Allocation
OriginAS: AS16509, AS39111, AS7224
Organization: Amazon.com, Inc. (AMAZON-4)
RegDate: 2010-08-27
Updated: 2015-09-24
Ref: https://rdap.arin.net/registry/ip/205.251.192.0
OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2020-03-31
Ref: https://rdap.arin.net/registry/entity/AMAZON-4
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN
OrgNOCHandle: AANO1-ARIN
OrgNOCName: Amazon AWS Network Operations
OrgNOCPhone: +1-206-266-4064
OrgNOCEmail: amzn-noc-contact@amazon.com
OrgNOCRef: https://rdap.arin.net/registry/entity/AANO1-ARIN
OrgRoutingHandle: ADR29-ARIN
OrgRoutingName: AWS Dogfish Routing
OrgRoutingPhone: +1-206-266-4064
OrgRoutingEmail: aws-dogfish-routing-poc@amazon.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/ADR29-ARIN
OrgRoutingHandle: IPROU3-ARIN
OrgRoutingName: IP Routing
OrgRoutingPhone: +1-206-266-4064
OrgRoutingEmail: aws-routing-poc@amazon.com
OrgRoutingRef: https://rdap.arin.net/registry/entity/IPROU3-ARIN
OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
RTechHandle: ROLEA19-ARIN
RTechName: Role Account
RTechPhone: +1-206-266-4064
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/ROLEA19-ARIN
RAbuseHandle: ROLEA19-ARIN
RAbuseName: Role Account
RAbusePhone: +1-206-266-4064
RAbuseEmail: ipmanagement@amazon.com
RAbuseRef: https://rdap.arin.net/registry/entity/ROLEA19-ARIN
RNOCHandle: ROLEA19-ARIN
RNOCName: Role Account
RNOCPhone: +1-206-266-4064
RNOCEmail: ipmanagement@amazon.com
RNOCRef: https://rdap.arin.net/registry/entity/ROLEA19-ARIN