Robtex

Up: 47.43.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 47.43.24.0/22
Down right: 47.43.28.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
47.43.26.4	PTR	mail-twc-com.msg.pkvw.co.charter.net
47.43.26.4	A	smtp-server.neb.rr.com
47.43.26.4	A	webmail.twcny.rr.com
47.43.26.7	PTR	pkvw-mx.msg.pkvw.co.charter.net
47.43.26.11	A	pop-server.ca.rr.com
47.43.26.22	A	pop-server.hawaii.rr.com
47.43.26.23	A	pop-server.hot.rr.com
47.43.26.35	A	pop-server.neo.rr.com
47.43.26.38	A+PTR	nyc-rr-com.msg.pkvw.co.charter.net
47.43.26.44	A	pop-server.roadrunner.com
47.43.26.57	A	pop-server.twcny.rr.com
47.43.26.58	A	pop-server.tx.rr.com
47.43.26.59	A	pop-server.wi.rr.com
47.43.26.67	A	mx1.biz.rr.com
47.43.26.68	A	mx2.biz.rr.com
47.43.26.70	A	mail.biz.rr.com
47.43.26.137	A+PTR	p-impout006aa.msg.pkvw.co.charter.net
47.43.26.138	A+PTR	p-impout007aa.msg.pkvw.co.charter.net
47.43.26.141	A+PTR	p-impout010aa.msg.pkvw.co.charter.net
47.43.26.149	PTR	p-impin008aa.msg.pkvw.co.charter.net
47.43.26.165	PTR	p-bc5-impout002aa.msg.pkvw.co.charter.net