Robtex

Up: 210.5.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.5.240.0/23
Down right: 210.5.242.0/23

IP	Type	Hostname
210.5.240.1	A+PTR	rtr-vpn01-fa0-0.sta.newskies.net
210.5.240.73	A	mux-asia05a.sta.newskies.net
210.5.240.74	A+PTR	mux-asia05b.sta.newskies.net
210.5.240.77	A	mux-me03a.sta.newskies.net
210.5.240.81	A	rps-col01.sta.newskies.net
210.5.242.141	PTR	210-5-242-141.reverse.newskies.net
210.5.242.145	PTR	210-5-242-145.reverse.newskies.net