Robtex

Up: 64.139.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 64.139.16.0/22
Down right: 64.139.20.0/22

IP	Type	Hostname
64.139.17.2	A+PTR	ip-64-139-17-2.dsl.den.megapath.net
64.139.17.105	A+PTR	ip-64-139-17-105.dsl.den.megapath.net
64.139.17.205	A	westerndecks.com
64.139.17.206	PTR	ip-64-139-17-206.dsl.den.megapath.net
64.139.17.206	A	mail.westerndecks.com
64.139.18.153	A+PTR	ip-64-139-18-153.den.megapath.net
64.139.19.180	A+PTR	ip-64-139-19-180.dsl.den.megapath.net
64.139.19.180	A	ns2.exampletechnologies.com
64.139.19.181	A	wealthonomics.co
64.139.19.181	A	vvectorholding.com
64.139.19.188	A	powersellercenter.com
64.139.20.2	A	ip-64-139-20-2.den.megapath.net
64.139.20.5	PTR	ip-64-139-20-5.den.megapath.net
64.139.20.93	PTR	ip-64-139-20-93.den.megapath.net
64.139.20.103	A+PTR	ip-64-139-20-103.den.megapath.net
64.139.20.124	A+PTR	ip-64-139-20-124.den.megapath.net
64.139.20.148	A+PTR	ip-64-139-20-148.den.megapath.net
64.139.20.185	A+PTR	ip-64-139-20-185.den.megapath.net
64.139.21.19	A+PTR	ip-64-139-21-19.dsl.den.megapath.net
64.139.21.20	A+PTR	ip-64-139-21-20.dsl.den.megapath.net
64.139.22.49	A+PTR	ip-64-139-22-49.dsl.den.megapath.net
64.139.23.45	A+PTR	ip-64-139-23-45.dsl.den.megapath.net