Robtex

Up: 152.86.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 152.87.0.0/17
Down right: 152.87.128.0/17
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
152.87.3.6	A+PTR	exeuntknx.tva.gov
152.87.4.11	PTR	ns4.tva.gov
152.87.4.11	PTR	ns6.tva.gov
152.87.4.20	A	ns4.tva.gov
152.87.4.20	A	gtmxk.tva.gov
152.87.4.20	A	ns6.tva.gov
152.87.42.19	A+PTR	benjamin.tva.gov