Robtex

Up: 169.139.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 169.139.19.0/25
Down right: 169.139.19.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
169.139.19.5	PTR	fusion.mdpls.org
169.139.19.7	A	mail.mdpls.org
169.139.19.10	PTR	splash.mdpls.org
169.139.19.10	A+PTR	webmail.mdpls.org
169.139.19.17	A+PTR	calendar.mdpls.org
169.139.19.17	A+PTR	calendar.mdpls.com
169.139.19.17	PTR	calendar.mdpls.net
169.139.19.24	A+PTR	hybrid.mdpls.org
169.139.19.24	A	autodiscover.mdpls.org
169.139.19.26	A	hoopla.mdpls.org
169.139.19.37	PTR	mdpls.org
169.139.19.37	A+PTR	digital.mdpls.org
169.139.19.37	PTR	www.mdpls.org
169.139.19.45	A+PTR	mail.mdpls.net
169.139.19.49	A+PTR	vmorga.mdpls.org
169.139.19.50	A	vmorgb.mdpls.org
169.139.19.51	A	archive.mdpls.org
169.139.19.52	A	vmneta.mdpls.net
169.139.19.53	A	vmnetb.mdpls.net
169.139.19.54	A	vmcoma.mdpls.com
169.139.19.57	A	vmcomb.mdpls.com
169.139.19.58	A	archive.mdpls.org
169.139.19.63	PTR	webcatalog.mdpls.com
169.139.19.74	A+PTR	mdport1pub.mdpls.org
169.139.19.74	A	mdport1pub.mdpls.net
169.139.19.75	A	mdport2pub.mdpls.org
169.139.19.75	A	mdport2pub.mdpls.net
169.139.19.82	A+PTR	ezproxy.mdpls.org
169.139.19.82	PTR	*.ezproxy.mdpls.org
169.139.19.83	A	mail.mdpls.com
169.139.19.84	A+PTR	powera.mdpls.org
169.139.19.84	A	powera.mdpls.net
169.139.19.84	A	powera.mdpls.com
169.139.19.85	A+PTR	powerb.mdpls.org
169.139.19.85	A	powerb.mdpls.net
169.139.19.85	A	powerb.mdpls.com