Robtex

Up: 173.89.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.89.144.0/21
Down right: 173.89.152.0/21

IP	Type	Hostname
173.89.144.196	A+PTR	cpe-173-89-144-196.new.res.rr.com
173.89.144.196	A	nguyenrivers.com
173.89.145.114	A+PTR	cpe-173-89-145-114.new.res.rr.com
173.89.145.153	A+PTR	cpe-173-89-145-153.new.res.rr.com
173.89.145.182	A	namescash.com
173.89.146.176	A+PTR	cpe-173-89-146-176.new.res.rr.com
173.89.146.251	A+PTR	cpe-173-89-146-251.new.res.rr.com
173.89.146.251	A	tedsastro.dnsalias.com
173.89.146.255	A+PTR	cpe-173-89-146-255.new.res.rr.com
173.89.146.255	A	echotangofoxtrot.com
173.89.147.27	A+PTR	cpe-173-89-147-27.new.res.rr.com
173.89.147.56	A+PTR	cpe-173-89-147-56.new.res.rr.com
173.89.147.171	A+PTR	cpe-173-89-147-171.new.res.rr.com
173.89.147.177	A+PTR	cpe-173-89-147-177.new.res.rr.com
173.89.147.177	A	squirrelnestrentals.com
173.89.147.193	A+PTR	cpe-173-89-147-193.new.res.rr.com
173.89.148.9	A+PTR	cpe-173-89-148-9.new.res.rr.com
173.89.148.189	A	petespc.tk
173.89.150.52	A+PTR	cpe-173-89-150-52.new.res.rr.com
173.89.152.130	A+PTR	cpe-173-89-152-130.new.res.rr.com
173.89.153.38	A+PTR	cpe-173-89-153-38.new.res.rr.com
173.89.153.174	A+PTR	cpe-173-89-153-174.new.res.rr.com
173.89.153.174	A	mysouthpark.net
173.89.155.49	A	elockworks.dyndns.org
173.89.156.10	A	inphotonix.com
173.89.157.71	A+PTR	cpe-173-89-157-71.new.res.rr.com
173.89.157.71	A	www.jtryba.com
173.89.157.168	A+PTR	cpe-173-89-157-168.new.res.rr.com
173.89.157.168	A	forums.jtryba.com
173.89.157.209	PTR	cpe-173-89-157-209.new.res.rr.com
173.89.158.55	A+PTR	cpe-173-89-158-55.new.res.rr.com
173.89.158.55	A	webmaginationllc.com
173.89.158.73	PTR	cpe-173-89-158-73.new.res.rr.com
173.89.158.225	PTR	cpe-173-89-158-225.new.res.rr.com
173.89.159.206	A+PTR	cpe-173-89-159-206.new.res.rr.com