Robtex

Up: 213.131.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 213.131.76.0/23
Down right: 213.131.78.0/23

IP	Type	Hostname
213.131.76.3	PTR	wtc.mobinil.com
213.131.76.13	PTR	host-213-131-76-13.mobinil.com
213.131.76.34	PTR	e-world.mobinil.com
213.131.76.45	PTR	host-213-131-76-45.mobinil.com
213.131.76.52	PTR	mail.mobinil.com
213.131.76.53	PTR	host-213-131-76-53.mobinil.com
213.131.76.68	PTR	mail.eastmartours.com
213.131.76.84	PTR	host-213-131-76-84.static.link.com.eg
213.131.76.134	PTR	mail.bue.edu.eg
213.131.76.173	PTR	host-213-131-76-173.static.link.com.eg
213.131.76.203	A+PTR	mailx.ufe.edu.eg
213.131.76.204	PTR	host-213-131-76-204.static.link.com.eg
213.131.77.2	PTR	mail.pins-egy.com
213.131.77.6	PTR	host-213-131-77-6.static.link.com.eg
213.131.77.10	PTR	mail.omsme.com
213.131.77.18	PTR	host-213-131-77-18.static.link.com.eg
213.131.77.65	PTR	host-213-131-77-65.static.link.com.eg
213.131.77.91	A	maileg.deltagalil.com
213.131.77.92	A	eg.deltagalil.com
213.131.77.163	PTR	host-213-131-77-163.static.link.com.eg
213.131.77.197	PTR	host-213-131-77-197.static.link.com.eg
213.131.78.28	PTR	host-213-131-78-28.static.link.com.eg
213.131.78.76	PTR	host-213-131-78-76.static.link.com.eg
213.131.78.98	PTR	host-213-131-78-98.static.link.com.eg
213.131.78.115	PTR	host-213-131-78-115.static.link.com.eg
213.131.78.135	PTR	host-213-131-78-135.static.link.com.eg
213.131.78.235	PTR	host-213-131-78-235.static.link.com.eg
213.131.79.36	PTR	mail.mti-mmgroup.com
213.131.79.37	A+PTR	email.mti-mmgroup.com
213.131.79.39	PTR	host-213-131-79-39.static.link.com.eg
213.131.79.106	PTR	host-213-131-79-106.static.link.com.eg
213.131.79.229	PTR	host-213-131-79-229.static.link.com.eg
213.131.79.236	PTR	host-213-131-79-236.static.link.com.eg
213.131.79.246	PTR	host-213-131-79-246.static.link.com.eg