Robtex

Up: 206.20.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 206.20.0.0/18
Down right: 206.20.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.20.2.1	A	b12sb01.n2p.com
206.20.2.10	A+PTR	b12sb02.n2p.com
206.20.2.245	A	sw1-bc12-ewr1.inet.n2p.com
206.20.3.1	A	b12sb05.n2p.com
206.20.3.251	A+PTR	sw2-bc12-10g-ewr1.inet.n2p.com
206.20.4.125	A	wkdu.com
206.20.7.1	PTR	b12sb08.n2p.com
206.20.7.10	A	b12sb09.n2p.com
206.20.7.20	A	b12sb10.n2p.com
206.20.7.30	A	b12sb11.n2p.com
206.20.7.50	A	b12sb12.n2p.com
206.20.13.2	PTR	server2.iop.com
206.20.19.2	PTR	webmail.humed.com
206.20.39.108	A	partyman.com
206.20.39.108	A	mail.partyman.com
206.20.39.108	A	www.partyman.com
206.20.53.54	A	net2phone.ro
206.20.53.54	A	www.net2phonedirect.org
206.20.53.54	A	net2phone.net
206.20.83.66	A	ns.bernstein.com
206.20.103.1	PTR	ga1.georgicallc.com
206.20.105.102	PTR	linda.go-pc.com
206.20.105.140	PTR	port1.go-pc.com
206.20.116.1	PTR	thorin.rfasource.com