Robtex

Up: 216.55.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 216.55.248.0/22
Down right: 216.55.252.0/22

IP	Type	Hostname
216.55.248.3	PTR	server248-3.conexion.com.py
216.55.250.4	PTR	server.conexion.com.py
216.55.250.16	PTR	server.conexion.com.py
216.55.250.99	PTR	server.conexion.com.py
216.55.250.114	PTR	server.conexion.com.py
216.55.250.144	PTR	server.conexion.com.py
216.55.250.145	PTR	server.conexion.com.py
216.55.250.208	PTR	server.conexion.com.py
216.55.250.241	PTR	server.conexion.com.py
216.55.251.32	PTR	server.conexion.com.py
216.55.251.185	PTR	server.conexion.com.py
216.55.252.146	PTR	server.conexion.com.py
216.55.253.10	PTR	server.conexion.com.py
216.55.253.33	PTR	server.conexion.com.py
216.55.253.226	PTR	server.conexion.com.py