Robtex

Up: 208.81.28.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 208.81.28.0/24
Down right: 208.81.29.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.81.28.75	PTR	mail3.lincare.com
208.81.28.75	A	mail3.hcenet.com
208.81.28.75	A	mail3.umedical.com
208.81.28.76	A+PTR	ns2.lincare.com
208.81.28.76	A	optigen.net
208.81.28.76	A	medilinkhomecare.com
208.81.28.111	A	owa.lincare.com
208.81.28.133	A	access.lincare.com
208.81.28.137	A+PTR	mail1.lincare.com
208.81.28.137	A	medilinkhomecare.com
208.81.28.137	A	mail1.convacareservices.com
208.81.28.138	PTR	sm0.lincare.com
208.81.28.138	A	medilinkhomecare.com
208.81.28.138	A	mail5.rtholdings.com
208.81.28.141	PTR	ns1.lincare.com
208.81.28.141	A	optigen.net
208.81.28.141	A	medilinkhomecare.com
208.81.29.25	A+PTR	mail2.lincare.com
208.81.29.25	A	medilinkhomecare.com
208.81.29.25	A	mail2.acropharmacy.com
208.81.29.26	PTR	mail4.lincare.com
208.81.29.27	A+PTR	mail7.lincare.com
208.81.29.27	A	medilinkhomecare.com
208.81.29.27	A	mail7.rtholdings.com
208.81.29.41	A+PTR	ns4.lincare.com
208.81.29.41	A	optigen.net
208.81.29.41	A	medilinkhomecare.com