Robtex

Up: 199.68.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.68.28.0/23
Down right: 199.68.30.0/23
(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
199.68.28.24	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
199.68.30.3	PTR	3-30-68-199.ipv4.digidesert.net
199.68.30.25	PTR	25-30-68-199.ipv4.digidesert.net
199.68.30.28	PTR	28-30-68-199.ipv4.digidesert.net
199.68.30.35	PTR	35-30-68-199.ipv4.digidesert.net
199.68.30.42	PTR	42-30-68-199.ipv4.digidesert.net
199.68.30.49	PTR	49-30-68-199.ipv4.digidesert.net
199.68.30.60	PTR	60-30-68-199.ipv4.digidesert.net
199.68.30.66	PTR	66-30-68-199.ipv4.digidesert.net
199.68.30.86	PTR	86-30-68-199.ipv4.digidesert.net
199.68.30.91	PTR	91-30-68-199.ipv4.digidesert.net
199.68.30.92	PTR	92-30-68-199.ipv4.digidesert.net
199.68.30.97	PTR	97-30-68-199.ipv4.digidesert.net
199.68.30.98	PTR	98-30-68-199.ipv4.digidesert.net
199.68.30.100	PTR	100-30-68-199.ipv4.digidesert.net
199.68.30.101	PTR	101-30-68-199.ipv4.digidesert.net
199.68.30.103	PTR	103-30-68-199.ipv4.digidesert.net
199.68.30.109	PTR	109-30-68-199.ipv4.digidesert.net
199.68.30.115	PTR	115-30-68-199.ipv4.digidesert.net
199.68.30.121	PTR	121-30-68-199.ipv4.digidesert.net
199.68.30.129	PTR	rix.si
199.68.30.130	PTR	130-30-68-199.ipv4.digidesert.net
199.68.30.131	PTR	131-30-68-199.ipv4.digidesert.net
199.68.30.134	PTR	134-30-68-199.ipv4.digidesert.net
199.68.30.148	PTR	148-30-68-199.ipv4.digidesert.net
199.68.30.152	PTR	152-30-68-199.ipv4.digidesert.net
199.68.30.153	PTR	153-30-68-199.ipv4.digidesert.net
199.68.30.157	PTR	157-30-68-199.ipv4.digidesert.net
199.68.30.162	PTR	162-30-68-199.ipv4.digidesert.net
199.68.30.164	PTR	164-30-68-199.ipv4.digidesert.net
199.68.30.167	PTR	167-30-68-199.ipv4.digidesert.net
199.68.30.168	PTR	168-30-68-199.ipv4.digidesert.net
199.68.30.170	PTR	170-30-68-199.ipv4.digidesert.net
199.68.30.172	PTR	172-30-68-199.ipv4.digidesert.net
199.68.30.174	PTR	174-30-68-199.ipv4.digidesert.net
199.68.30.178	PTR	178-30-68-199.ipv4.digidesert.net
199.68.30.181	PTR	181-30-68-199.ipv4.digidesert.net
199.68.30.185	PTR	185-30-68-199.ipv4.digidesert.net
199.68.30.186	PTR	186-30-68-199.ipv4.digidesert.net
199.68.30.190	PTR	190-30-68-199.ipv4.digidesert.net
199.68.30.193	PTR	193-30-68-199.ipv4.digidesert.net
199.68.30.196	PTR	196-30-68-199.ipv4.digidesert.net
199.68.30.201	PTR	201-30-68-199.ipv4.digidesert.net
199.68.30.207	PTR	207-30-68-199.ipv4.digidesert.net
199.68.30.222	PTR	222-30-68-199.ipv4.digidesert.net
199.68.30.224	PTR	224-30-68-199.ipv4.digidesert.net
199.68.30.228	PTR	228-30-68-199.ipv4.digidesert.net
199.68.30.233	PTR	233-30-68-199.ipv4.digidesert.net
199.68.30.237	PTR	237-30-68-199.ipv4.digidesert.net
199.68.30.246	PTR	246-30-68-199.ipv4.digidesert.net
199.68.30.247	PTR	247-30-68-199.ipv4.digidesert.net
199.68.30.252	PTR	252-30-68-199.ipv4.digidesert.net
199.68.31.21	PTR	21-31-68-199.ipv4.digidesert.net
199.68.31.27	PTR	27-31-68-199.ipv4.digidesert.net