Robtex

Up: 103.18.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.18.156.0/23
Down right: 103.18.158.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.18.156.1	A+PTR	pdns.sparkbroadband.com
103.18.156.2	PTR	static.sparkbroadband.com
103.18.156.10	PTR	static.sparkbroadband.com
103.18.156.154	PTR	smtp1-153.apleclick.com
103.18.156.154	A	splashbroadband.com
103.18.156.154	A	www.sparkbroadband.com
103.18.156.166	PTR	static.sparkbroadband.com
103.18.156.178	A+PTR	smtp1-177.apleclick.com
103.18.156.178	A	www.sparkbroadband.com
103.18.157.1	A+PTR	sdns.sparkbroadband.com
103.18.157.180	PTR	static.sparkbroadband.com
103.18.159.28	PTR	undefined.hostname.localhost