Robtex

Up: 203.20.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.20.36.0/23
Down right: 203.20.38.0/23

IP	Type	Hostname
203.20.36.5	PTR	vf05.vodafone.com.au
203.20.36.16	PTR	vf16.vodafone.com.au
203.20.36.23	PTR	vf23.vodafone.com.au
203.20.36.27	A+PTR	vf27.vodafone.com.au
203.20.36.45	A+PTR	vf45.vodafone.com.au
203.20.36.46	A+PTR	vf46.vodafone.com.au
203.20.36.58	PTR	vf58.vodafone.com.au
203.20.36.60	PTR	vf60.vodafone.com.au
203.20.36.73	PTR	vf73.vodafone.com.au
203.20.36.74	PTR	vf74.vodafone.com.au
203.20.36.75	PTR	vf75.vodafone.com.au
203.20.36.80	A	vf80.vodafone.com.au
203.20.36.96	A	vf96.vodafone.com.au
203.20.36.99	A+PTR	vf99.vodafone.com.au
203.20.36.101	PTR	vf101.vodafone.com.au
203.20.36.108	A+PTR	vf108.vodafone.com.au
203.20.36.113	A+PTR	vf113.vodafone.com.au
203.20.36.114	A+PTR	vf114.vodafone.com.au
203.20.36.132	PTR	vf132.vodafone.com.au
203.20.36.139	PTR	vf139.vodafone.com.au
203.20.36.156	A+PTR	vf156.vodafone.com.au
203.20.36.158	A+PTR	vf158.vodafone.com.au
203.20.36.164	PTR	vf164.vodafone.com.au
203.20.36.171	A+PTR	vf171.vodafone.com.au
203.20.36.174	A	vf174.vodafone.com.au
203.20.36.179	A+PTR	vf179.vodafone.com.au
203.20.36.183	A+PTR	vf183.vodafone.com.au
203.20.36.187	A+PTR	vf187.vodafone.com.au
203.20.36.188	PTR	vf188.vodafone.com.au
203.20.36.194	A+PTR	vf194.vodafone.com.au
203.20.36.200	PTR	vf200.vodafone.com.au
203.20.36.206	PTR	vf206.vodafone.com.au
203.20.36.208	PTR	vf208.vodafone.com.au
203.20.36.209	A+PTR	vf209.vodafone.com.au
203.20.36.218	A+PTR	vf218.vodafone.com.au
203.20.36.225	A+PTR	vf225.vodafone.com.au
203.20.36.227	A	vf227.vodafone.com.au
203.20.36.230	A+PTR	vf230.vodafone.com.au
203.20.36.237	PTR	vf237.vodafone.com.au
203.20.36.240	A+PTR	vf240.vodafone.com.au
203.20.36.247	A	channels.vodafone.com.au