Robtex

Up: 72.1.32.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.1.32.0/21
Down right: 72.1.40.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.1.32.14	A	outdoorsportshow.com
72.1.32.14	A	atdns2b.alliancetech.com
72.1.32.151	A+PTR	ns1.domaindiscover.com
72.1.32.158	A+PTR	tierra.net
72.1.32.158	A	domaindiscover.com
72.1.32.158	A	www.domaindiscover.com
72.1.32.168	A	davidmckitrick.com
72.1.32.168	A	advamas.biz
72.1.32.168	A	eroticpjs.com
72.1.32.185	A	ns1.tierra.net
72.1.33.3	A+PTR	ns1-colo.tierra.net
72.1.33.5	A+PTR	url1-colo.tierra.net
72.1.33.5	A	kimberlynewman.com
72.1.33.5	A	alertml.net
72.1.33.6	PTR	url2-colo.tierra.net
72.1.33.6	A	kimberlynewman.com
72.1.33.6	A	alertml.net
72.1.33.139	PTR	numberbarn.com
72.1.33.143	A	signsplat.com
72.1.40.16	A+PTR	airrents.com
72.1.40.35	A	subfra.me
72.1.40.82	A+PTR	faxferret.com
72.1.40.83	A+PTR	theramonan.com
72.1.46.1	PTR	gi2-0.poway.tierra.net
72.1.46.3	A	nat.phone.com
72.1.46.8	A	sip-beta.phone.com
72.1.46.10	A	sip.phone.com
72.1.46.31	A	adm01-san.phone.com
72.1.46.55	A+PTR	clock.phone.com
72.1.46.56	A	clock.phone.com
72.1.46.57	A	stun.phone.com
72.1.46.71	A	vmhost1.phone.com
72.1.46.83	A	*.phone.com
72.1.46.83	A	phonedot.com
72.1.46.83	A	beta.phone.com
72.1.46.98	A+PTR	syslog.phone.com
72.1.46.101	PTR	phone.com
72.1.46.102	A	sandbox1.phone.com
72.1.46.106	A	supportphd.com
72.1.46.106	A	www.supportphd.com
72.1.46.119	A+PTR	cisco.prov.phone.com
72.1.46.122	A	pccsr.com
72.1.46.122	A	www.pccsr.com
72.1.46.151	A+PTR	ns1.san.phone.com
72.1.46.152	A+PTR	ns2.san.phone.com
72.1.46.199	A	provisioningphone.com
72.1.46.221	A+PTR	sip05.phone.com
72.1.47.231	A+PTR	lb1.phoenix.phone.com
72.1.47.231	A	api.phone.com
72.1.47.232	A+PTR	lb2.phoenix.phone.com
72.1.47.232	A	api.phone.com