Robtex

Up: 50.201.182.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 50.201.183.0/25
Down right: 50.201.183.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
50.201.183.4	A+PTR	50-201-183-4-static.hfc.comcastbusiness.net
50.201.183.4	A	burvpn.endurance.com
50.201.183.4	A	burasa01.bizland-inc.com
50.201.183.56	A+PTR	50-201-183-56-static.hfc.comcastbusiness.net
50.201.183.56	A	et04.maileig.com
50.201.183.57	A+PTR	50-201-183-57-static.hfc.comcastbusiness.net
50.201.183.57	A	et05.maileig.com
50.201.183.58	A+PTR	50-201-183-58-static.hfc.comcastbusiness.net
50.201.183.58	A	et06.maileig.com
50.201.183.98	PTR	50-201-183-98-static.hfc.comcastbusiness.net
50.201.183.103	PTR	50-201-183-103-static.hfc.comcastbusiness.net
50.201.183.103	A	incoming.yh-abuse.com
50.201.183.103	A	exchange1.email.yourhostingaccount.com
50.201.183.104	PTR	50-201-183-104-static.hfc.comcastbusiness.net
50.201.183.104	A	bizmail.bizland-inc.com
50.201.183.115	A+PTR	50-201-183-115-static.hfc.comcastbusiness.net
50.201.183.138	A	50-201-183-138-static.hfc.comcastbusiness.net
50.201.183.141	A+PTR	50-201-183-141-static.hfc.comcastbusiness.net
50.201.183.225	A+PTR	mail4.buydomains.com
50.201.183.225	A	mx2.namemedia.com
50.201.183.228	A+PTR	50-201-183-228-static.hfc.comcastbusiness.net
50.201.183.228	A	mail3.buydomains.com
50.201.183.235	A	50-201-183-235-static.hfc.comcastbusiness.net