Robtex

Up: 149.13.72.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 149.13.72.0/24
Down right: 149.13.73.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
149.13.73.45	A+PTR	mx137.antispamcloud.com
149.13.73.45	A	mx1.microplanet.fr
149.13.73.45	A	mx1.safeserverhost.com
149.13.73.46	PTR	mx138.antispamcloud.com
149.13.73.46	A	mx1.safeserverhost.com
149.13.73.46	A	mx1.idspamexperts.indotrans.net.id
149.13.73.47	PTR	mx139.antispamcloud.com
149.13.73.47	A	mx1.microplanet.fr
149.13.73.47	A	mx1.safeserverhost.com
149.13.73.48	PTR	mx140.antispamcloud.com
149.13.73.48	A	mx1.microplanet.fr
149.13.73.48	A	mx1.safeserverhost.com
149.13.73.55	PTR	mx141.antispamcloud.com
149.13.73.55	A	mx1.safeserverhost.com
149.13.73.55	A	mx1.idspamexperts.indotrans.net.id
149.13.73.56	PTR	mx142.antispamcloud.com
149.13.73.56	A	mx1.microplanet.fr
149.13.73.56	A	mx1.itsn.nl
149.13.73.57	PTR	mx143.antispamcloud.com
149.13.73.57	A	mx1.safeserverhost.com
149.13.73.57	A	mx1.itsn.nl
149.13.73.58	A+PTR	mx144.antispamcloud.com
149.13.73.58	A	mx1.microplanet.fr
149.13.73.58	A	mx1.safeserverhost.com
149.13.73.60	A+PTR	quarantine10.antispamcloud.com
149.13.73.60	A	release.antispamcloud.com