Robtex

Up: 111.221.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 111.221.76.0/23
Down right: 111.221.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
111.221.76.60	A+PTR	msuc05dr.manage.microsoft.com
111.221.76.60	A	portal.msuc05.manage.microsoft.com
111.221.76.60	A	msuc05.manage.microsoft.com
111.221.76.158	PTR	sippoolhkn0f03.infra.lync.com
111.221.76.164	A	exap.um.outlook.com
111.221.77.2	PTR	ae0-976.hkn-96gmr-1a.ntwk.msn.net
111.221.77.3	PTR	ae0-976.hkn-96gmr-1b.ntwk.msn.net
111.221.77.140	A	dsn7.skype-dsn.akadns.net
111.221.77.141	A	dsn9.skype-dsn.akadns.net
111.221.77.142	A	dsn7.skype-dsn.akadns.net
111.221.77.142	A	dsn16.d.skype.net
111.221.77.142	A	dsn13.skype-dsn.akadns.net
111.221.77.143	A	dsn16.d.skype.net
111.221.77.143	A	dsn6.skype-dsn.akadns.net
111.221.77.145	A	dsn7.skype-dsn.akadns.net
111.221.77.146	A	dsn15.skype-dsn.akadns.net
111.221.77.147	A	dsn9.skype-dsn.akadns.net
111.221.77.147	A	dsn15.skype-dsn.akadns.net
111.221.77.148	A	dsn16.d.skype.net
111.221.77.150	A	dsn7.skype-dsn.akadns.net
111.221.77.150	A	dsn16.d.skype.net
111.221.77.150	A	dsn6.skype-dsn.akadns.net
111.221.77.151	A	dsn7.skype-dsn.akadns.net
111.221.77.151	A	dsn6.skype-dsn.akadns.net
111.221.77.151	A	dsn0.skype-dsn.akadns.net
111.221.77.152	A	dsn7.skype-dsn.akadns.net
111.221.77.152	A	dsn13.skype-dsn.akadns.net
111.221.77.153	A	dsn6.skype-dsn.akadns.net
111.221.77.154	A	dsn7.skype-dsn.akadns.net
111.221.77.154	A	dsn9.skype-dsn.akadns.net
111.221.77.155	A	dsn16.d.skype.net
111.221.77.156	A	dsn13.skype-dsn.akadns.net
111.221.77.157	A	dsn0.skype-dsn.akadns.net
111.221.77.158	A	dsn16.d.skype.net
111.221.77.158	A	dsn0.skype-dsn.akadns.net
111.221.77.159	A	dsn9.skype-dsn.akadns.net
111.221.77.159	A	dsn6.skype-dsn.akadns.net
111.221.77.161	A	dsn7.skype-dsn.akadns.net
111.221.77.162	A	dsn7.skype-dsn.akadns.net
111.221.77.163	A	dsn0.skype-dsn.akadns.net
111.221.77.164	A	dsn15.skype-dsn.akadns.net
111.221.77.164	A	dsn0.skype-dsn.akadns.net
111.221.77.165	A	dsn16.d.skype.net
111.221.77.165	A	dsn15.skype-dsn.akadns.net
111.221.77.166	A	dsn13.skype-dsn.akadns.net
111.221.77.167	A	dsn7.skype-dsn.akadns.net
111.221.77.167	A	dsn16.d.skype.net
111.221.77.168	A	dsn7.skype-dsn.akadns.net
111.221.77.168	A	dsn9.skype-dsn.akadns.net
111.221.77.168	A	dsn13.skype-dsn.akadns.net
111.221.77.169	A	dsn7.skype-dsn.akadns.net
111.221.77.169	A	dsn9.skype-dsn.akadns.net
111.221.77.170	A	dsn7.skype-dsn.akadns.net
111.221.77.170	A	dsn0.skype-dsn.akadns.net
111.221.77.172	A	dsn16.d.skype.net
111.221.77.175	A	dsn15.skype-dsn.akadns.net
111.221.77.175	A	dsn6.skype-dsn.akadns.net
111.221.77.176	A	dsn16.d.skype.net
111.221.77.176	A	dsn0.skype-dsn.akadns.net