Robtex

Up: 199.19.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.19.52.0/23
Down right: 199.19.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.19.52.29	PTR	pr1.app19.nrt1.afilias-nst.info
199.19.52.30	PTR	exit.front-lhs.mia1.afilias-nst.info
199.19.52.33	PTR	pr1.app23.nrt1.afilias-nst.info
199.19.52.34	PTR	pr1.app24.nrt1.afilias-nst.info
199.19.52.35	PTR	pr1.app25.nrt1.afilias-nst.info
199.19.52.36	PTR	pr1.app26.nrt1.afilias-nst.info
199.19.52.40	PTR	pr1.app30.nrt1.afilias-nst.info
199.19.52.61	PTR	front-rhs.r2.mia1.afilias-nst.info
199.19.52.64	PTR	pr2-service-net.nrt1.afilias-nst.info
199.19.52.64	A	r1.mia1.afilias-nst.info
199.19.52.65	PTR	irb100.pr2.nrt1.afilias-nst.info
199.19.52.65	A	r2.mia1.afilias-nst.info
199.19.52.66	A	cpr1.mia1.afilias-nst.info
199.19.52.67	A+PTR	cpr2.mia1.afilias-nst.info
199.19.52.79	PTR	pr2.app5.nrt1.afilias-nst.info
199.19.52.96	PTR	pr2.app22.nrt1.afilias-nst.info
199.19.52.96	A	hw.mia1.afilias-nst.info
199.19.52.102	PTR	pr2.app28.nrt1.afilias-nst.info
199.19.52.102	A	hw.mgmt1.mia1.afilias-nst.info
199.19.52.103	A+PTR	hw.mgmt2.mia1.afilias-nst.info
199.19.52.106	PTR	pr2.app32.nrt1.afilias-nst.info
199.19.52.106	A	pdu2b.mia1.afilias-nst.info
199.19.52.106	A	hw.pdu2b.mia1.afilias-nst.info
199.19.52.107	A	hw.pdu2a.mia1.afilias-nst.info
199.19.52.108	A	hw.pdu1b.mia1.afilias-nst.info
199.19.52.109	A	pdu1a.mia1.afilias-nst.info
199.19.52.109	A	hw.pdu1a.mia1.afilias-nst.info
199.19.52.128	A	back.mia1.afilias-nst.info
199.19.52.129	PTR	vrrp.back.nrt1.afilias-nst.info
199.19.52.129	A	back.app1.mia1.afilias-nst.info
199.19.52.130	PTR	back.mr1.nrt1.afilias-nst.info
199.19.52.130	A	app2.mia1.afilias-nst.info
199.19.52.130	A	back.app2.mia1.afilias-nst.info
199.19.52.131	PTR	back.mr2.nrt1.afilias-nst.info
199.19.52.132	A+PTR	back.s1.nrt1.afilias-nst.info
199.19.52.132	A	app4.mia1.afilias-nst.info
199.19.52.132	A	back.app4.mia1.afilias-nst.info
199.19.52.133	A	back.app5.mia1.afilias-nst.info
199.19.52.134	PTR	laptop.nrt1.afilias-nst.info
199.19.52.135	PTR	tservepr1.nrt1.afilias-nst.info
199.19.52.136	PTR	back.mgmt1.nrt1.afilias-nst.info
199.19.52.136	A	back.app8.mia1.afilias-nst.info
199.19.52.136	A	app8.mia1.afilias-nst.info
199.19.52.175	A+PTR	back.app25.nrt1.afilias-nst.info
199.19.52.177	A+PTR	back.app27.nrt1.afilias-nst.info
199.19.52.178	A+PTR	back.app28.nrt1.afilias-nst.info
199.19.52.178	A	app28.nrt1.afilias-nst.info
199.19.52.192	A+PTR	back.mgmt1.mia1.afilias-nst.info
199.19.52.192	A	mgmt1.mia1.afilias-nst.info
199.19.52.193	PTR	pr1-mr1.nrt1.afilias-nst.info
199.19.52.193	A	mgmt2.mia1.afilias-nst.info
199.19.52.193	A	back.mgmt2.mia1.afilias-nst.info
199.19.52.200	A	meas1.mia1.afilias-nst.info
199.19.52.200	A	back.meas1.mia1.afilias-nst.info
199.19.52.201	PTR	pr2-s3.nrt1.afilias-nst.info
199.19.52.216	A	noc-216.mia1.afilias-nst.info
199.19.52.217	A	opennms.mia1.afilias-nst.info
199.19.52.219	A+PTR	noc1.mia1.afilias-nst.info
199.19.52.226	PTR	mr2.vm.nrt1.afilias-nst.info
199.19.52.248	A	s1.nrt1.afilias-nst.info
199.19.52.250	PTR	ps1.nrt1.afilias-nst.info
199.19.52.250	A	back.dps1.mia1.afilias-nst.info
199.19.52.250	A	dps1.mia1.afilias-nst.info
199.19.52.251	A+PTR	mr1.nrt1.afilias-nst.info
199.19.52.252	A+PTR	mr2.nrt1.afilias-nst.info
199.19.52.252	A	back.cpr1.mia1.afilias-nst.info
199.19.52.253	A+PTR	pr1.nrt1.afilias-nst.info
199.19.52.253	A	back.cpr2.mia1.afilias-nst.info
199.19.52.254	PTR	exit.back.mia1.afilias-nst.info
199.19.53.1	A+PTR	c0.org.afilias-nst.org
199.19.53.1	A	c0.org.afilias-nst.info
199.19.53.1	A	c0.nic.ong
199.19.54.1	A+PTR	b0.org.afilias-nst.org
199.19.54.1	A	b0.nic.ngo
199.19.54.1	A	b0.org.afilias-nst.info
199.19.55.1	A+PTR	a0.asia.afilias-nst.asia
199.19.55.1	A	a0.asia.afilias-nst.info