Robtex

Up: 206.47.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 206.47.40.0/23
Down right: 206.47.42.0/23

IP	Type	Hostname
206.47.41.6	PTR	ppp1276.rlaval.bellglobal.com
206.47.41.109	PTR	ppp1379.rlaval.bellglobal.com
206.47.41.114	PTR	ppp1384.rlaval.bellglobal.com
206.47.41.121	A	lisewatierfoundation.com
206.47.41.156	PTR	ppp1426.rlaval.bellglobal.com
206.47.41.233	PTR	ppp1503.rlaval.bellglobal.com
206.47.41.246	A	mail.lisewatierfoundation.com
206.47.42.10	A	hrbvpn.hrblock.ca
206.47.42.130	PTR	fsofirewall.hrblock.ca
206.47.42.144	PTR	imap.hrblock.ca
206.47.42.146	PTR	fsomailgw.hrblock.ca
206.47.42.146	PTR	mail.hrblock.ca
206.47.42.169	A+PTR	outlook.hrblock.ca
206.47.42.175	A	autodiscover.hrblock.ca
206.47.42.188	A	hrcnodns1.hrblock.ca