Robtex

Up: 38.109.22.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 38.109.22.0/25
Down right: 38.109.22.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
38.109.22.5	PTR	mail.cloudinbox.com
38.109.22.6	PTR	medimix.net
38.109.22.7	PTR	mail.medimix.net
38.109.22.17	PTR	mail.venturiangroup.com
38.109.22.20	PTR	mailgate.dnsportal.net
38.109.22.20	A	mailgate.rccassociates.com
38.109.22.20	A	mailgate.venturianhosting.com
38.109.22.22	A	mail.cloudinbox.com
38.109.22.58	A	mind360games.com
38.109.22.58	A	intelligentlivinginc.com
38.109.22.58	A	mind360adhd.com
38.109.22.60	PTR	www.starcasualty.com
38.109.22.63	A	starmail.starcasualty.com
38.109.22.73	A	venturiandemo.com
38.109.22.80	PTR	vapp2.paymentcard.com
38.109.22.124	PTR	nap.305hosting.net
38.109.22.127	PTR	nap.305hosting.net
38.109.22.130	A	dns1.venturianhosting.com
38.109.22.134	PTR	nap.venturianhosting.com
38.109.22.135	PTR	nap.venturianhosting.com
38.109.22.137	PTR	nap.venturianhosting.com
38.109.22.160	PTR	mail.woundtech.net
38.109.22.161	PTR	mail.woundtech.net
38.109.22.240	PTR	nap.305consulting.com
38.109.22.242	PTR	nap.305consulting.com
38.109.22.243	PTR	nap.305consulting.com