Robtex

Up: 66.174.72.0/21
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Down left: 66.174.72.0/23
Down right: 66.174.74.0/23

IP	Type	Hostname
66.174.72.0	A+PTR	0.sub-66-174-72.myvzw.com
66.174.72.73	A+PTR	73.sub-66-174-72.myvzw.com
66.174.73.0	A+PTR	0.sub-66-174-73.myvzw.com
66.174.74.0	A+PTR	0.sub-66-174-74.myvzw.com
66.174.75.0	A+PTR	0.sub-66-174-75.myvzw.com
66.174.75.10	A+PTR	10.sub-66-174-75.myvzw.com
66.174.75.10	A	labwig.org
66.174.75.29	A+PTR	labsim-01.vzwtest.com
66.174.75.44	A+PTR	tier2mms.vzwtest.com
66.174.75.105	A	wctest.vdcapps.com
66.174.75.171	A	171.sub-66-174-75.myvzw.com
66.174.75.180	A	labwig.com