Robtex

Up: 139.255.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 139.255.52.0/23
Down right: 139.255.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
139.255.52.18	PTR	ln-static-139-255-52-18.link.net.id
139.255.52.18	A	vendis.biz
139.255.52.19	A	dc-170932a3.mobilesalesforce.info
139.255.52.19	A	dc-7af68b3e698d.mobilesalesforce.info
139.255.52.21	PTR	ln-static-139-255-52-21.link.net.id
139.255.52.21	A	audioproindonesia.com
139.255.52.42	PTR	ln-static-139-255-52-42.link.net.id
139.255.52.70	PTR	ln-static-139-255-52-70.link.net.id
139.255.52.131	PTR	ln-static-139-255-52-131.link.net.id
139.255.52.131	A	smtp.pesonaedu.com
139.255.52.131	A	mail.kairupan.com
139.255.52.132	PTR	ln-static-139-255-52-132.link.net.id
139.255.52.132	A	pesonaedu-store.com
139.255.52.132	A	ip2.pesonaedu.com
139.255.52.133	PTR	ln-static-139-255-52-133.link.net.id
139.255.52.133	A	amazingedu.com
139.255.52.137	A	smtp.pesonaedu.com
139.255.52.137	A	mail.kairupan.com
139.255.52.137	A	mail.pesonaedu.com
139.255.52.203	PTR	ln-static-139-255-52-203.link.net.id
139.255.52.254	PTR	ln-static-139-255-52-254.link.net.id
139.255.53.51	A	mail.bethsaidahospitals.com
139.255.53.53	A	www.bethsaidahospitals.com
139.255.53.53	A	bethsaidahospitals.com
139.255.53.74	A	www.sabuse.com
139.255.53.74	A	sabuse.com
139.255.53.75	PTR	ln-static-139-255-53-75.link.net.id
139.255.53.116	PTR	ln-static-139-255-53-116.link.net.id
139.255.53.147	A	mail.sub-mscid.com
139.255.54.83	PTR	ln-static-139-255-54-83.link.net.id
139.255.54.83	A	id.myteksi.net
139.255.54.147	PTR	ln-static-139-255-54-147.link.net.id
139.255.54.187	A+PTR	mail.yudistiraenergy.com
139.255.54.198	PTR	ln-static-139-255-54-198.link.net.id
139.255.54.198	A	www.feelbuy.net
139.255.54.198	A	feelbuy.net
139.255.55.70	PTR	ln-static-139-255-55-70.link.net.id
139.255.55.130	A	mail.jnetgr.com
139.255.55.130	A	jnetgr.com
139.255.55.131	PTR	ln-static-139-255-55-131.link.net.id
139.255.55.147	PTR	ln-static-139-255-55-147.link.net.id
139.255.55.154	PTR	ln-static-139-255-51-154.link.net.id
139.255.55.155	PTR	ln-static-139-255-55-155.link.net.id
139.255.55.155	A	mail.jtrustbank.co.id
139.255.55.156	A+PTR	asav.jtrustbank.co.id
139.255.55.156	A+PTR	mx1.jtrustbank.co.id
139.255.55.156	A	smtp.mutiarabank.co.id
139.255.55.163	PTR	ln-static-139-255-55-163.link.net.id
139.255.55.163	A	www.wip.myonline.id
139.255.55.163	A	ibank.mayapadaonline.com
139.255.55.179	PTR	ln-static-139-255-55-179.link.net.id