Robtex

Up: 203.58.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.58.16.0/24
Down right: 203.58.17.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.58.16.9	PTR	eve.tpgi.com.au
203.58.16.9	A	helpdesk.tpgi.com.au
203.58.16.22	A	firewall.tpgi.com.au
203.58.17.1	A+PTR	203-58-17-1.static.tpgi.com.au
203.58.17.75	A	203-58-17-75.static.tpgi.com.au
203.58.17.100	A+PTR	203-58-17-100.static.tpgi.com.au
203.58.17.101	A+PTR	203-58-17-101.static.tpgi.com.au
203.58.17.149	A+PTR	203-58-17-149.static.tpgi.com.au
203.58.17.192	A	203-58-17-192.static.tpgi.com.au
203.58.17.228	A+PTR	203-58-17-228.static.tpgi.com.au
203.58.17.242	PTR	mail.aspcontact.com
203.58.17.242	A	mail.ozgymkhana.com.au
203.58.17.242	A	asprally.com