Robtex

Up: 68.64.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 68.64.18.0/24
Down right: 68.64.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.64.18.16	A+PTR	vdc5nd7-mcr.las2a.expertcity.com
68.64.18.26	A+PTR	vdc5nd15-mcr.las2a.expertcity.com
68.64.18.28	PTR	vdc8nd2-mcr.sjc.expertcity.com
68.64.18.29	PTR	vdc8nd3-mcr.sjc.expertcity.com
68.64.18.29	A	vdc1nd15-mcr.las2a.expertcity.com
68.64.18.30	PTR	vdc8nd4-mcr.sjc.expertcity.com
68.64.18.31	A	vdc1nd17-mcr.las2a.expertcity.com
68.64.18.36	PTR	vdc8nd10-mcr.sjc.expertcity.com
68.64.18.38	A	vdc5nd16-mcr.las2a.expertcity.com
68.64.18.40	PTR	vdc9h2-logon.sjc.expertcity.com
68.64.18.43	A	vdc3nd13-mcr.las2a.expertcity.com
68.64.18.44	A+PTR	vdc3nd14-mcr.sjc.expertcity.com
68.64.18.44	A+PTR	vdc3nd14-mcr.las2a.expertcity.com
68.64.18.45	A+PTR	vdc3nd15-mcr.las2a.expertcity.com
68.64.18.45	A+PTR	vdc3nd15-mcr.sjc.expertcity.com
68.64.18.46	PTR	vdc9nd4-mcr.sjc.expertcity.com
68.64.18.47	A	vdc3nd17-mcr.las2a.expertcity.com
68.64.18.48	A+PTR	vdc3nd18-mcr.las2a.expertcity.com
68.64.18.48	A+PTR	vdc3nd18-mcr.sjc.expertcity.com
68.64.18.51	PTR	vdc9nd9-mcr.sjc.expertcity.com
68.64.18.52	A+PTR	vdc3nd22-mcr.sjc.expertcity.com
68.64.18.53	PTR	vdc10h1-logon.sjc.expertcity.com
68.64.18.55	A	vdc5nd21-mcr.las2a.expertcity.com
68.64.18.56	PTR	vdc10h2-logon.sjc.expertcity.com
68.64.18.59	PTR	vdc10nd1-mcr.sjc.expertcity.com
68.64.18.61	A	vdc2nd15-mcr.las2a.expertcity.com
68.64.18.63	PTR	vdc10nd5-mcr.sjc.expertcity.com
68.64.18.66	PTR	vdc10nd8-mcr.sjc.expertcity.com
68.64.18.67	PTR	vdc10nd9-mcr.sjc.expertcity.com
68.64.18.71	A+PTR	besc6nd2-bes.las2a.expertcity.com
68.64.18.72	A+PTR	besc7h1-bes.las2a.expertcity.com
68.64.18.83	PTR	vdc11nd9-mcr.sjc.expertcity.com
68.64.18.97	PTR	vdc13nd9-mcr.sjc.expertcity.com
68.64.18.99	A	besc1h1-bes.las2a.expertcity.com
68.64.18.100	A+PTR	besc1nd1-bes.las2a.expertcity.com
68.64.18.101	PTR	besc2h1-bes.sjc.expertcity.com
68.64.18.101	A	besc2h1-bes.las2a.expertcity.com
68.64.18.102	PTR	besc2nd1-bes.sjc.expertcity.com
68.64.18.102	A	besc2nd1-bes.las2a.expertcity.com
68.64.18.103	A+PTR	besc1h2-bes.las2a.expertcity.com
68.64.18.104	A+PTR	besc1nd2-bes.las2a.expertcity.com
68.64.18.104	A	besc1nd2-bes.sjc.expertcity.com
68.64.18.105	A+PTR	besc2h2-bes.las2a.expertcity.com
68.64.18.106	PTR	besc2nd2-bes.sjc.expertcity.com
68.64.18.106	A	besc2nd2-bes.las2a.expertcity.com
68.64.18.107	A+PTR	vdc2nd1-mcr.las2a.expertcity.com
68.64.18.109	PTR	vdc1h1-logon.las2a.expertcity.com
68.64.18.113	PTR	vdc2h1-logon.las2a.expertcity.com
68.64.18.113	PTR	vdc2h2-logon.las2a.expertcity.com
68.64.18.117	A+PTR	vdc3h1-logon.las2a.expertcity.com
68.64.18.117	A+PTR	vdc3h1-logon.sjc.expertcity.com
68.64.18.123	A	vdc1nd3-mcr.las2a.expertcity.com
68.64.18.126	A	vdc1nd6-mcr.las2a.expertcity.com
68.64.18.129	PTR	vdc1nd9-mcr.sjc.expertcity.com
68.64.18.137	A+PTR	vdc2nd7-mcr.las2a.expertcity.com
68.64.18.138	PTR	vdc2nd8-mcr.sjc.expertcity.com
68.64.18.139	PTR	vdc2nd9-mcr.las2a.expertcity.com
68.64.18.140	PTR	vdc2nd10-mcr.sjc.expertcity.com
68.64.18.142	A+PTR	vdc3nd2-mcr.sjc.expertcity.com
68.64.18.142	A+PTR	vdc3nd2-mcr.las2a.expertcity.com
68.64.18.145	PTR	vdc3nd5-mcr.sjc.expertcity.com
68.64.18.145	A+PTR	vdc3nd5-mcr.las2a.expertcity.com
68.64.18.146	A+PTR	vdc3nd6-mcr.sjc.expertcity.com
68.64.18.147	PTR	vdc3nd7-mcr.sjc.expertcity.com
68.64.18.147	A	vdc3nd7-mcr.las2a.expertcity.com
68.64.18.149	A+PTR	vdc3nd9-mcr.sjc.expertcity.com
68.64.18.149	A+PTR	vdc3nd9-mcr.las2a.expertcity.com
68.64.18.151	A+PTR	besc3h1-bes.las2a.expertcity.com
68.64.18.152	PTR	besc3h2-bes.sjc.expertcity.com
68.64.18.152	A	besc3h2-bes.las2a.expertcity.com
68.64.18.153	A+PTR	besc3nd1-bes.las2a.expertcity.com
68.64.18.154	A+PTR	besc3nd2-bes.las2a.expertcity.com
68.64.18.155	A+PTR	besc4h1-bes.las2a.expertcity.com
68.64.18.156	PTR	besc4h2-bes.sjc.expertcity.com
68.64.18.156	A	besc4h2-bes.las2a.expertcity.com
68.64.18.157	PTR	besc4nd1-bes.las2a.expertcity.com
68.64.18.158	A+PTR	besc4nd2-bes.las2a.expertcity.com
68.64.18.163	A+PTR	vdc4h1-logon.las2a.expertcity.com
68.64.18.167	A+PTR	vdc4nd1-mcr.las2a.expertcity.com
68.64.18.170	A+PTR	vdc4nd4-mcr.las2a.expertcity.com
68.64.18.173	A+PTR	vdc4nd7-mcr.las2a.expertcity.com
68.64.18.174	A+PTR	vdc4nd8-mcr.las2a.expertcity.com
68.64.18.175	A+PTR	vdc4nd9-mcr.las2a.expertcity.com
68.64.18.177	A+PTR	vdc4nd11-mcr.las2a.expertcity.com
68.64.18.183	A+PTR	vdc4nd17-mcr.las2a.expertcity.com
68.64.18.185	A+PTR	vdc4nd19-mcr.las2a.expertcity.com
68.64.18.187	A+PTR	vdc4nd21-mcr.las2a.expertcity.com
68.64.18.188	A+PTR	vdc4nd22-mcr.las2a.expertcity.com
68.64.18.189	A+PTR	besc5h1-bes.las2a.expertcity.com
68.64.18.191	A+PTR	besc5nd1-bes.las2a.expertcity.com
68.64.18.192	A+PTR	besc5nd2-bes.las2a.expertcity.com
68.64.19.20	PTR	mail1.ord.expertcity.com
68.64.19.195	A+PTR	ns1.citrixonline.biz
68.64.19.195	A+PTR	ns1.expertcity.com
68.64.19.195	PTR	ns2.citrixonline.eu
68.64.19.200	A+PTR	download.citrixonline.com
68.64.19.201	PTR	download.citrixonline.com