Robtex

Up: 199.68.28.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 199.68.28.0/24
Down right: 199.68.29.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.68.28.3	A	vpn.ex3.com
199.68.28.5	PTR	v64.rtr1.ipv4.ex3.com
199.68.28.7	A+PTR	mail.ex3.com
199.68.28.7	A	7-28-68-199.ipv4.ex3.com
199.68.28.11	A+PTR	11-28-68-199.ipv4.ex3.com
199.68.28.14	A+PTR	14-28-68-199.ipv4.ex3.com
199.68.28.15	A+PTR	15-28-68-199.ipv4.ex3.com
199.68.28.20	A+PTR	20-28-68-199.ipv4.ex3.com
199.68.28.20	A	pcroissant.com
199.68.28.20	A	edms.co.in
199.68.28.21	PTR	v66.rtr1.ipv4.ex3.com
199.68.28.23	PTR	23-28-68-199.ipv4.ex3.com
199.68.28.23	A	mail.b612foundation.org
199.68.28.23	A	www.ex3.com
199.68.28.24	PTR	24-28-68-199.ipv4.ex3.com
199.68.28.24	A	mail.ldself.org
199.68.28.24	A	mail.joegoldblatt.com
199.68.28.25	PTR	25-28-68-199.ipv4.ex3.com
199.68.28.30	A+PTR	30-28-68-199.ipv4.ex3.com
199.68.28.36	A+PTR	36-28-68-199.ipv4.ex3.com
199.68.28.42	A+PTR	42-28-68-199.ipv4.ex3.com
199.68.28.48	A+PTR	48-28-68-199.ipv4.ex3.com
199.68.28.58	A+PTR	58-28-68-199.ipv4.ex3.com
199.68.28.60	A+PTR	60-28-68-199.ipv4.ex3.com
199.68.28.62	A+PTR	62-28-68-199.ipv4.ex3.com
199.68.28.63	A+PTR	63-28-68-199.ipv4.ex3.com
199.68.28.64	A+PTR	64-28-68-199.ipv4.ex3.com
199.68.28.66	A+PTR	66-28-68-199.ipv4.ex3.com
199.68.28.69	A+PTR	69-28-68-199.ipv4.ex3.com
199.68.28.75	A+PTR	75-28-68-199.ipv4.ex3.com
199.68.28.79	A+PTR	79-28-68-199.ipv4.ex3.com
199.68.28.86	A+PTR	86-28-68-199.ipv4.ex3.com
199.68.28.88	A+PTR	88-28-68-199.ipv4.ex3.com
199.68.28.92	A+PTR	92-28-68-199.ipv4.ex3.com
199.68.28.99	A+PTR	99-28-68-199.ipv4.ex3.com
199.68.28.102	A+PTR	102-28-68-199.ipv4.ex3.com
199.68.28.107	A+PTR	107-28-68-199.ipv4.ex3.com
199.68.28.128	A+PTR	128-28-68-199.ipv4.ex3.com
199.68.28.129	PTR	rtr1.ipv4.ex3.com
199.68.28.131	A+PTR	131-28-68-199.ipv4.ex3.com
199.68.28.136	A+PTR	136-28-68-199.ipv4.ex3.com
199.68.28.139	A+PTR	139-28-68-199.ipv4.ex3.com
199.68.28.141	A+PTR	141-28-68-199.ipv4.ex3.com
199.68.28.150	A+PTR	ns1.ex3.com
199.68.28.151	A+PTR	ns2.ex3.com
199.68.28.157	A+PTR	157-28-68-199.ipv4.ex3.com
199.68.28.158	PTR	oldcisco.ipv4.ex3.com
199.68.28.160	A+PTR	160-28-68-199.ipv4.ex3.com
199.68.28.168	A+PTR	168-28-68-199.ipv4.ex3.com
199.68.28.170	A+PTR	170-28-68-199.ipv4.ex3.com
199.68.28.176	A+PTR	176-28-68-199.ipv4.ex3.com
199.68.28.189	A+PTR	189-28-68-199.ipv4.ex3.com
199.68.28.191	A+PTR	191-28-68-199.ipv4.ex3.com
199.68.28.193	A+PTR	193-28-68-199.ipv4.ex3.com
199.68.28.197	A+PTR	197-28-68-199.ipv4.ex3.com
199.68.28.205	A+PTR	205-28-68-199.ipv4.ex3.com
199.68.28.208	A+PTR	208-28-68-199.ipv4.ex3.com
199.68.28.215	A+PTR	215-28-68-199.ipv4.ex3.com
199.68.28.220	A+PTR	220-28-68-199.ipv4.ex3.com
199.68.28.223	A+PTR	223-28-68-199.ipv4.ex3.com
199.68.28.224	A+PTR	224-28-68-199.ipv4.ex3.com
199.68.28.229	A+PTR	229-28-68-199.ipv4.ex3.com
199.68.28.234	A+PTR	234-28-68-199.ipv4.ex3.com
199.68.28.242	A+PTR	242-28-68-199.ipv4.ex3.com
199.68.28.244	A+PTR	244-28-68-199.ipv4.ex3.com
199.68.29.130	A+PTR	130-29-68-199.ipv4.ex3.com
199.68.29.130	A	www.ex3host.com
199.68.29.130	A	ex3host.com
199.68.29.132	A	nasa.ex3host.com
199.68.29.140	A+PTR	140-29-68-199.ipv4.ex3.com
199.68.29.140	A	ex3.com
199.68.29.140	A	ex3.net
199.68.29.142	PTR	142-29-68-199.ipv4.ex3.com
199.68.29.142	A	cnl-online.org