Robtex

Up: 139.255.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 139.255.44.0/23
Down right: 139.255.46.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
139.255.44.44	PTR	ln-static-139-255-44-44.link.net.id
139.255.44.170	PTR	mail.pu.go.id
139.255.44.175	PTR	ln-static-139-255-44-175.link.net.id
139.255.45.10	A+PTR	mail.jayatamactc.com
139.255.45.10	PTR	ln-static-139-255-45-10.link.net.id
139.255.45.10	A	jayatamactc.com
139.255.45.19	PTR	ln-static-139-255-45-19.link.net.id
139.255.45.139	PTR	ln-static-139-255-45-139.link.net.id
139.255.45.139	A	www.perbanasinstitute.ac.id
139.255.45.139	A	perbanasinstitute.ac.id
139.255.45.140	PTR	ln-static-139-255-45-140.link.net.id
139.255.45.140	A	ns2.perbanasinstitute.ac.id
139.255.45.140	A	ns2.stieperbanas.ac.id
139.255.45.141	PTR	ln-static-139-255-45-141.link.net.id
139.255.45.145	PTR	ln-static-139-255-45-145.link.net.id
139.255.46.19	PTR	ln-static-139-255-46-19.link.net.id
139.255.46.43	PTR	ln-static-139-255-46-43.link.net.id
139.255.46.43	A	mail-drc.kpei.co.id
139.255.46.67	A+PTR	mail.imq21.com
139.255.46.138	A	ns1.simasnet.com
139.255.46.138	A	ex2.simasnet.com
139.255.46.140	A	trading.simasnet.com
139.255.46.154	A+PTR	mail.valdo.co.id
139.255.46.204	A	hpx.co.id
139.255.47.3	PTR	ln-static-139-255-47-3.link.net.id
139.255.47.17	PTR	ln-static-139-255-47-17.link.net.id
139.255.47.18	PTR	ln-static-139-255-47-18.link.net.id
139.255.47.19	PTR	ln-static-139-255-47-19.link.net.id
139.255.47.23	PTR	ln-static-139-255-47-23.link.net.id
139.255.47.27	PTR	centratama.com
139.255.47.27	PTR	retower.co.id
139.255.47.28	A	mail.centratama.com
139.255.47.29	A	mail.centratama.com
139.255.47.30	A	mail.centratama.com
139.255.47.49	PTR	ln-static-139-255-47-49.link.net.id
139.255.47.51	PTR	ln-static-139-255-47-51.link.net.id
139.255.47.54	PTR	ln-static-139-255-47-54.link.net.id
139.255.47.54	A	propanflooring.com
139.255.47.75	PTR	ln-static-139-255-47-75.link.net.id
139.255.47.75	A	mitra.indikafm.com
139.255.47.77	PTR	ln-static-139-255-47-77.link.net.id
139.255.47.78	PTR	ln-static-139-255-47-78.link.net.id
139.255.47.83	PTR	ln-static-139-255-47-83.link.net.id
139.255.47.147	PTR	ln-static-139-255-47-147.link.net.id
139.255.47.154	PTR	ln-static-139-255-47-154.link.net.id
139.255.47.165	A	mail.baliparagon.com
139.255.47.183	A	ippi.astra.co.id
139.255.47.211	A	mail.thetranshotel.com
139.255.47.211	A	mail.thetransresort.com
139.255.47.211	A	mail.transresortbali.com
139.255.47.214	PTR	ln-static-139-255-47-214.link.net.id
139.255.47.214	A	mailprotection.thetranshotel.com
139.255.47.220	A	bdg.transstudioworld.com
139.255.47.220	A	mail.transstudiobandung.com
139.255.47.221	PTR	ln-static-139-255-47-221.link.net.id
139.255.47.221	A	wstsm.transbrowser.org
139.255.47.221	A	hrtsb.transbrowser.org