Robtex

Up: 77.77.152.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.77.152.0/25
Down right: 77.77.152.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.77.152.1	A+PTR	routerbgp.ibs-bg.com
77.77.152.4	A+PTR	mx2.ibs.bg
77.77.152.7	A+PTR	mx.ibs.bg
77.77.152.9	A	bbr.ibs.bg
77.77.152.10	A	dev11w.ibs.bg
77.77.152.12	A	domino.ibs.bg
77.77.152.13	A+PTR	mail.ibs.bg
77.77.152.13	A	mx.ibs-bg.com
77.77.152.13	A	mail.ibs-bg.com
77.77.152.15	A+PTR	quickplace.ibs.bg
77.77.152.18	A	qp.ibs.bg
77.77.152.19	A	wineinbg.com
77.77.152.19	A	wineinbg.net
77.77.152.19	A	transel.bg
77.77.152.26	A	lenovoonline.mk
77.77.152.26	A	www.lenovoonline.mk
77.77.152.28	A	services.ibs.bg
77.77.152.29	A	www.busticket.bg
77.77.152.29	A	busticket.bg
77.77.152.30	A	locopo.net
77.77.152.30	A	www.locopo.net
77.77.152.32	A+PTR	lp.ibs-bg.com
77.77.152.34	A	blog.lenovoonline.bg
77.77.152.34	A	www.lenovoonline.bg
77.77.152.34	A	lenovoonline.bg
77.77.152.38	A	105architects.com
77.77.152.38	A	mail.poptodorova-lawyers.com
77.77.152.38	A	bgspamtrap.com
77.77.152.39	A	www.timeoff.guru
77.77.152.39	A	gserver1.ibs.bg
77.77.152.39	A	timeoff.guru
77.77.152.48	A	tashkov.com
77.77.152.57	A	evrobroker.com
77.77.152.83	A	www.ibs-bg.com
77.77.152.83	A	ibs-bg.com
77.77.152.83	A	www.ibs.bg
77.77.152.85	A	lotuscars.bg
77.77.152.85	A	tradenews.bg
77.77.152.85	A	stopanin.com
77.77.152.114	PTR	mail.glencom.bg
77.77.152.119	A	dev.ibs-bg.com
77.77.152.129	A	mail.green-mist.eu
77.77.152.129	A	greneth.com
77.77.152.140	A	vjfmarketing.com
77.77.152.140	A	mail.vjfmarketing.com
77.77.152.170	A	sametime.ibs.bg
77.77.152.193	A	dc-74509105c133.igsoft.bg
77.77.152.198	A	www.coinpoker.io
77.77.152.203	A	bac.bg