Robtex

Up: 198.133.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 198.133.16.0/21
Down right: 198.133.24.0/21

IP	Type	Hostname
198.133.18.72	A	noc.prserv.net
198.133.19.17	A	wpnoc-br1-tk0.ny.us.prserv.net
198.133.19.88	PTR	wendysmtp.on.ca.prserv.net
198.133.22.51	PTR	smtp1.ny.us.ibm.com
198.133.22.52	PTR	smtp2.ny.us.ibm.com
198.133.22.210	A	gate4.ca.us.ibm.com
198.133.22.211	A	gate5.ca.us.ibm.com
198.133.22.213	A	gate7.ca.us.ibm.com
198.133.23.40	PTR	phrack.net
198.133.23.41	PTR	dpak.org
198.133.26.70	A+PTR	test.noc.prserv.net
198.133.29.17	A+PTR	tollbooth.vnet.ibm.com
198.133.29.25	A	lms01.wp.mpn.ibm.com
198.133.29.90	PTR	ns3.prserv.net
198.133.29.90	A	ns.advantis.com