Robtex

Up: 158.70.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 158.70.128.0/19
Down right: 158.70.160.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
158.70.144.146	A+PTR	smtp2.ees.hhs.gov
158.70.144.149	A+PTR	owa.hhs.gov
158.70.144.149	A+PTR	webmail.hhs.gov
158.70.144.153	A	autodiscover.hhs.gov
158.70.146.70	A+PTR	smtp.oig.hhs.gov
158.70.178.10	PTR	acl.gov
158.70.178.10	PTR	aoa.gov
158.70.178.10	PTR	whcoa.gov
158.70.178.11	PTR	agingstats.gov
158.70.178.12	PTR	eldercare.gov
158.70.178.12	PTR	mail.nlrc.aoa.gov
158.70.178.12	A+PTR	mail.aoa.hhs.gov
158.70.181.78	A+PTR	socdc1-vtccodec01.hhs.gov
158.70.181.213	PTR	medicalreservecorps.hhs.gov
158.70.181.213	PTR	mrc.hhs.gov
158.70.181.213	A+PTR	medicalreservecorps.gov
158.70.184.43	A+PTR	vidyo-oem-gateway.hhs.gov