Robtex

Up: 139.255.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 139.255.42.0/25
Down right: 139.255.42.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
139.255.42.25	PTR	ln-static-139-255-42-25.link.net.id
139.255.42.35	PTR	ln-static-139-255-42-35.link.net.id
139.255.42.90	PTR	ln-static-139-255-42-90.link.net.id
139.255.42.222	A+PTR	mail.pactoltd.com
139.255.42.227	A	cdn.vivagroup.co.id
139.255.42.227	A	mx2.vivagroup.co.id
139.255.42.228	PTR	ln-static-139-255-42-228.link.net.id
139.255.42.228	A	dns2.vivagroup.co.id
139.255.42.229	PTR	ln-static-139-255-42-229.link.net.id
139.255.42.229	A	webmail.vivagroup.co.id
139.255.42.229	A	bedigital.co.id
139.255.42.231	A	mailhost1.vivagroup.co.id
139.255.42.232	A+PTR	mail.vivaplus.id
139.255.42.233	A	mail.anugrahlautanluas.com
139.255.42.234	PTR	ln-static-139-255-42-234.link.net.id
139.255.42.234	A	vivaplus.id
139.255.42.235	PTR	srv5.static.vivagroup.co.id
139.255.42.235	A	apps1.jktsky.com