Robtex

Up: 217.139.106.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.139.106.0/25
Down right: 217.139.106.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.139.106.26	A+PTR	mail.shakeregypt.com
217.139.106.26	A	mail.shakergroup.com
217.139.106.26	A	shakeregypt.com
217.139.106.27	A+PTR	mail.shakerconsult.com
217.139.106.140	A+PTR	mail.spinneys-egypt.com