Robtex

Up: 170.72.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 170.72.32.0/22
Down right: 170.72.36.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
170.72.32.195	A+PTR	170-72-32-195.vivintwireless.net
170.72.32.195	A	lookoutcrafts.com
170.72.33.200	A+PTR	170-72-33-200.vivintwireless.net
170.72.33.200	A	mail.axzys.org
170.72.33.200	A	mail.t1dutah.com
170.72.34.147	A	170-72-34-147.vivintwireless.net
170.72.34.245	A+PTR	170-72-34-245.vivintwireless.net
170.72.34.245	A	greeffworks.com
170.72.34.246	A+PTR	170-72-34-246.vivintwireless.net
170.72.34.246	A	workerscompensationservices.org
170.72.35.46	PTR	ebicb60102.webex.com
170.72.35.46	A	www.thestylishnest.com
170.72.35.46	A	170-72-35-46.vivintwireless.net
170.72.35.87	A+PTR	170-72-35-87.vivintwireless.net
170.72.35.105	A	mail.devinlineberry.com
170.72.35.201	A+PTR	170-72-35-201.vivintwireless.net
170.72.35.202	A	mail.googlieyes.net
170.72.35.202	A	mail.mulletsighting.com
170.72.36.146	A	thor.battleforce.com
170.72.36.146	A	www.battleforce.com
170.72.36.146	A	mail.battleforce.com
170.72.37.190	PTR	170-72-37-190.vivintwireless.net
170.72.37.190	A	fatalis.us.to
170.72.37.198	A+PTR	170-72-37-198.vivintwireless.net
170.72.37.198	A	andrewhook.com
170.72.37.198	A	theeveningstorm.com
170.72.38.54	A+PTR	170-72-38-54.vivintwireless.net
170.72.38.54	A	devinlineberry.com
170.72.38.62	PTR	m06lnmcs145.webex.com
170.72.38.62	A	tireslaguna.com
170.72.38.62	A	170-72-38-62.vivintwireless.net
170.72.38.200	A	proxy.sevenology.com
170.72.38.200	A	mail.duadua.org
170.72.38.203	A+PTR	170-72-38-203.vivintwireless.net
170.72.39.86	A+PTR	170-72-39-86.vivintwireless.net
170.72.39.104	A+PTR	170-72-39-104.vivintwireless.net
170.72.39.104	A	arnerschloss.com