Robtex

Up: 206.46.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 206.46.240.0/23
Down right: 206.46.242.0/23

IP	Type	Hostname
206.46.240.1	A	ctn-border1.vzlink.com
206.46.240.2	PTR	lo0.ctn-border2.vzlink.com
206.46.240.3	A	ctn-core1.vzlink.com
206.46.240.4	A	ctn-core2.vzlink.com
206.46.240.7	A	ctn-axis1.vzlink.com
206.46.240.141	A+PTR	vlan300.pnode1.ctn-tx.vzlink.com
206.46.240.253	PTR	vlan300.ctn-core2.vzlink.com
206.46.241.4	A	speedtest.verizon.net
206.46.241.9	A	fiosspeed3.west.verizon.net