Robtex

Up: 198.83.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 198.83.28.0/23
Down right: 198.83.30.0/23

IP	Type	Hostname
198.83.29.9	PTR	imap.jjay.cuny.edu
198.83.29.9	PTR	pop.jjay.cuny.edu
198.83.29.9	A+PTR	webmail.jjay.cuny.edu
198.83.29.169	PTR	pool-198-83-29-169.ac2.jjay.cuny.edu
198.83.29.241	PTR	mx3.jjay.cuny.edu
198.83.29.253	PTR	ns2.jjay.cuny.edu
198.83.29.254	PTR	ns1.jjay.cuny.edu
198.83.30.12	A	pool-198-83-30-12.ac2.jjay.cuny.edu
198.83.30.27	PTR	pool-198-83-30-27.ac2.jjay.cuny.edu
198.83.30.98	A	pool-198-83-30-98.ac2.jjay.cuny.edu