Robtex

Up: 37.9.208.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 37.9.216.0/22
Down right: 37.9.220.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
37.9.216.0	PTR	hosted-by.ezorg.nl
37.9.216.1	PTR	hosted-by.ezorg.nl
37.9.216.8	PTR	hosted-by.ezorg.nl
37.9.216.9	PTR	hosted-by.ezorg.nl
37.9.216.17	PTR	hosted-by.ezorg.nl
37.9.216.32	PTR	hosted-by.ezorg.nl
37.9.216.33	PTR	hosted-by.ezorg.nl
37.9.216.33	A	secure.ezorg.nl
37.9.216.34	PTR	hosted-by.ezorg.nl
37.9.216.34	A	webmail.ezorg.nl
37.9.216.35	PTR	spamfirewall01.cybercenter.ezorg.nl
37.9.216.35	A	barracuda.ezorg.nl
37.9.216.35	A	spamfilter01.ezorg.nl
37.9.216.36	A	barracuda.ezorg.nl
37.9.216.36	A	spamfilter02.ezorg.nl
37.9.216.36	A	spamfilter.ezorg.nl
37.9.216.41	A	mail.medischcentrumczaarpeter.nl
37.9.216.48	PTR	hosted-by.ezorg.nl
37.9.216.49	PTR	hosted-by.ezorg.nl
37.9.216.56	PTR	hosted-by.ezorg.nl
37.9.216.56	A	spamfilter02.ezorg.nl
37.9.216.56	A	spamfilter.ezorg.nl
37.9.216.57	PTR	spamfirewall05.cybercenter.ezorg.nl
37.9.216.57	A	spamfilter02.ezorg.nl
37.9.216.57	A	spamfilter.ezorg.nl
37.9.216.58	PTR	hosted-by.ezorg.nl
37.9.216.64	PTR	hosted-by.ezorg.nl
37.9.216.65	A+PTR	internet.ezorg.nl
37.9.216.65	A	mail.praktijkwatertoren.nl
37.9.216.65	A	mail.ezorg.nl
37.9.216.66	PTR	internet.ezorg.nl
37.9.216.67	PTR	internet.ezorg.nl
37.9.216.69	A	internet.ezorg.nl
37.9.216.70	A	internet.ezorg.nl
37.9.216.71	A	internet.ezorg.nl
37.9.216.72	A+PTR	internet.ezorg.nl
37.9.216.73	A+PTR	internet.ezorg.nl
37.9.216.74	A+PTR	internet.ezorg.nl
37.9.216.98	PTR	hosted-by.ezorg.nl
37.9.216.115	PTR	hosted-by.ezorg.nl
37.9.216.129	PTR	hosted-by.ezorg.nl
37.9.216.153	PTR	hosted-by.ezorg.nl
37.9.216.170	PTR	hosted-by.ezorg.nl
37.9.216.184	PTR	hosted-by.ezorg.nl
37.9.216.208	PTR	hosted-by.ezorg.nl
37.9.216.210	PTR	hosted-by.ezorg.nl
37.9.216.217	PTR	hosted-by.ezorg.nl
37.9.216.224	PTR	hosted-by.ezorg.nl
37.9.216.234	PTR	hosted-by.ezorg.nl
37.9.216.250	PTR	hosted-by.ezorg.nl
37.9.217.0	PTR	hosted-by.ezorg.nl
37.9.217.1	PTR	hosted-by.ezorg.nl
37.9.217.1	A	mail.hagrozwijndrecht.nl
37.9.217.1	A	spamfilter01.ictaurus.nl
37.9.217.16	PTR	hosted-by.ezorg.nl
37.9.217.17	PTR	floatingbyte.ezorg.nl
37.9.217.20	A	www.mediqonline.nl
37.9.217.22	A	mediq-apotheek.nl
37.9.217.34	PTR	blue.zorgdoc-nederland.nl
37.9.217.35	A+PTR	demo.zorgdoc.nl
37.9.217.36	A	demo.sos.zorgdoc.com
37.9.217.38	A	medver.nl
37.9.217.38	A	edge.zorgdoc.nl
37.9.217.38	A	www.medver.nl
37.9.217.40	A+PTR	edge.medver.nl
37.9.217.40	A	medver.nl
37.9.217.40	A	www.medver.nl
37.9.217.41	PTR	www.zorgdoc.nl
37.9.217.41	A	zorgdoc.nl
37.9.217.42	PTR	www.sos.zorgdoc.com
37.9.217.43	A+PTR	www.medver.nl
37.9.217.43	A	medver.nl
37.9.217.44	A	zorgdoc.nl
37.9.217.46	A	medver.nl
37.9.217.46	A	www.medver.nl
37.9.217.49	A	premezis-kis.nl
37.9.217.50	PTR	hosted-by.ezorg.nl
37.9.217.51	PTR	hosted-by.ezorg.nl
37.9.217.58	PTR	hosted-by.ezorg.nl
37.9.217.64	PTR	hosted-by.ezorg.nl
37.9.217.66	PTR	hosted-by.ezorg.nl
37.9.217.69	A	receptgemak.nl
37.9.217.106	PTR	hosted-by.ezorg.nl
37.9.217.107	PTR	hosted-by.ezorg.nl
37.9.217.112	PTR	hosted-by.ezorg.nl
37.9.217.120	PTR	hosted-by.ezorg.nl
37.9.217.168	PTR	hosted-by.ezorg.nl
37.9.217.170	PTR	hosted-by.ezorg.nl
37.9.217.178	PTR	hosted-by.ezorg.nl
37.9.217.185	PTR	hosted-by.ezorg.nl
37.9.217.243	PTR	hosted-by.ezorg.nl
37.9.218.11	A	spamfilter01.ezorg.nl
37.9.218.12	A	spamfilter01.ezorg.nl
37.9.220.2	PTR	hosted-by.ezorg.nl
37.9.220.11	PTR	hosted-by.ezorg.nl
37.9.220.18	PTR	hosted-by.ezorg.nl
37.9.220.43	PTR	hosted-by.ezorg.nl
37.9.220.49	PTR	hosted-by.ezorg.nl
37.9.220.57	PTR	hosted-by.ezorg.nl
37.9.220.65	PTR	hosted-by.ezorg.nl
37.9.220.89	PTR	hosted-by.ezorg.nl
37.9.220.104	PTR	hosted-by.ezorg.nl
37.9.220.120	PTR	hosted-by.ezorg.nl
37.9.220.123	PTR	hosted-by.ezorg.nl
37.9.220.138	PTR	hosted-by.ezorg.nl
37.9.220.144	PTR	hosted-by.ezorg.nl
37.9.220.146	PTR	hosted-by.ezorg.nl
37.9.220.163	PTR	hosted-by.ezorg.nl
37.9.220.184	PTR	hosted-by.ezorg.nl
37.9.220.200	PTR	hosted-by.ezorg.nl
37.9.220.218	PTR	hosted-by.ezorg.nl
37.9.220.224	PTR	hosted-by.ezorg.nl
37.9.220.243	PTR	hosted-by.ezorg.nl