Robtex

Up: 77.77.76.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.77.77.0/25
Down right: 77.77.77.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.77.77.7	PTR	77.77.77.7.parsdp.com
77.77.77.9	A+PTR	ns3.irib.ir
77.77.77.12	PTR	77.77.77.12.parsdp.com
77.77.77.12	A	irib.ir
77.77.77.16	PTR	77.77.77.16.parsdp.com
77.77.77.18	PTR	77.77.77.18.parsdp.com
77.77.77.19	A	www.irib.ir
77.77.77.19	A	cdn3.tv3.ir
77.77.77.19	A	livecdn1.irib.ir
77.77.77.26	PTR	77.77.77.26.parsdp.com
77.77.77.40	A	bpmo.ir
77.77.77.40	A	pmo.ir
77.77.77.41	PTR	77.77.77.41.parsdp.com
77.77.77.41	A	mrc.pmo.ir
77.77.77.41	A	imrh.ir
77.77.77.44	PTR	77.77.77.44.parsdp.com
77.77.77.44	A	apsez.ir
77.77.77.60	PTR	77.77.77.60.parsdp.com
77.77.77.61	PTR	77.77.77.61.parsdp.com
77.77.77.66	A+PTR	rahcomco.ir
77.77.77.66	PTR	www.rahcomco.ir
77.77.77.69	PTR	77.77.77.69.parsdp.com
77.77.77.70	PTR	77.77.77.70.parsdp.com
77.77.77.71	PTR	77.77.77.71.parsdp.com
77.77.77.77	PTR	ns3.hiweb.ir
77.77.77.77	A	wntest201112131201jr.me
77.77.77.77	A	fv-auto.com
77.77.77.78	A+PTR	ns4.hiweb.ir
77.77.77.81	PTR	77.77.77.81.parsdp.com
77.77.77.83	A	points.digikalacloud.com
77.77.77.83	A	digistyle.mobi