Robtex

Up: 198.255.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 198.255.128.0/19
Down right: 198.255.160.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.255.128.0	PTR	cpe-198-255-128-0.nyc.res.rr.com
198.255.128.93	A	cpe-198-255-128-93.nyc.res.rr.com
198.255.128.164	A	cpe-198-255-128-164.stny.res.rr.com
198.255.128.243	A	cpe-198-255-128-243.stny.res.rr.com
198.255.129.223	A	cpe-198-255-129-223.nyc.res.rr.com
198.255.130.63	A	cpe-198-255-130-63.stny.res.rr.com
198.255.130.174	A	fengpanhome.com
198.255.130.174	A	forwardob.com
198.255.131.151	A+PTR	cpe-198-255-131-151.stny.res.rr.com
198.255.131.151	A	cwa.no-ip.net
198.255.131.216	A+PTR	cpe-198-255-131-216.stny.res.rr.com
198.255.133.36	A	cpe-198-255-133-36.stny.res.rr.com
198.255.134.121	A+PTR	cpe-198-255-134-121.stny.res.rr.com
198.255.134.121	A	mellentech.com
198.255.137.1	PTR	cpe-198-255-137-1.nyc.res.rr.com
198.255.137.67	PTR	cpe-198-255-137-67.nyc.res.rr.com
198.255.137.116	A	139murray.com
198.255.137.117	A	cwa.no-ip.net
198.255.142.84	A+PTR	cpe-198-255-142-84.stny.res.rr.com
198.255.143.11	A+PTR	cpe-198-255-143-11.stny.res.rr.com
198.255.143.11	A	mail.nrollo.com
198.255.143.11	A	nrollo.com
198.255.145.75	A	mellentech.com
198.255.147.179	A	cpe-198-255-147-179.stny.res.rr.com
198.255.147.206	A	cpe-198-255-147-206.stny.res.rr.com
198.255.148.33	A	nateway.net
198.255.151.108	A+PTR	cpe-198-255-151-108.stny.res.rr.com
198.255.151.108	A	mx1.ualocal112.org
198.255.151.108	A	lu112.ddns.net
198.255.151.128	PTR	cpe-198-255-151-128.stny.res.rr.com
198.255.153.41	A	drirton.com
198.255.158.69	A+PTR	cpe-198-255-158-69.stny.res.rr.com
198.255.158.237	A+PTR	cpe-198-255-158-237.stny.res.rr.com
198.255.158.237	A	propertyinvestmentinspections.com
198.255.160.69	A+PTR	cpe-198-255-160-69.twcny.res.rr.com
198.255.160.69	A	scootin159.duckdns.org
198.255.161.158	A+PTR	cpe-198-255-161-158.twcny.res.rr.com
198.255.161.158	A	mail.joshuabasile.com
198.255.161.158	A	mail.basilesolutions.today
198.255.161.236	A+PTR	cpe-198-255-161-236.twcny.res.rr.com
198.255.161.236	A	joshuabasile.com
198.255.162.133	A+PTR	cpe-198-255-162-133.twcny.res.rr.com
198.255.162.133	A	scootin159.duckdns.org
198.255.162.133	A	home.scootin159.com
198.255.163.193	A+PTR	cpe-198-255-163-193.twcny.res.rr.com
198.255.164.152	A+PTR	cpe-198-255-164-152.twcny.res.rr.com
198.255.165.22	A+PTR	cpe-198-255-165-22.twcny.res.rr.com
198.255.165.200	A+PTR	cpe-198-255-165-200.twcny.res.rr.com
198.255.165.200	A	rivercams.dyndns.org
198.255.170.14	A	dpldocs.info
198.255.170.151	PTR	cpe-198-255-170-151.twcny.res.rr.com
198.255.175.17	A+PTR	cpe-198-255-175-17.twcny.res.rr.com
198.255.176.35	A+PTR	cpe-198-255-176-35.maine.res.rr.com
198.255.176.112	A+PTR	cpe-198-255-176-112.maine.res.rr.com
198.255.176.112	A	knuckleduster05.com
198.255.177.1	A+PTR	cpe-198-255-177-1.maine.res.rr.com
198.255.177.1	A	northernhives.com
198.255.177.211	PTR	cpe-198-255-177-211.maine.res.rr.com
198.255.178.130	A+PTR	cpe-198-255-178-130.maine.res.rr.com
198.255.178.142	A	lafi.org
198.255.180.82	A+PTR	cpe-198-255-180-82.maine.res.rr.com
198.255.180.116	A+PTR	cpe-198-255-180-116.maine.res.rr.com
198.255.180.116	A	absolute-zero.com
198.255.181.161	A+PTR	cpe-198-255-181-161.maine.res.rr.com
198.255.183.61	A+PTR	cpe-198-255-183-61.maine.res.rr.com
198.255.184.45	A+PTR	cpe-198-255-184-45.maine.res.rr.com
198.255.186.62	A+PTR	cpe-198-255-186-62.maine.res.rr.com
198.255.186.62	A	blackbird.cc
198.255.187.36	A+PTR	cpe-198-255-187-36.maine.res.rr.com
198.255.187.36	A	portlandplayerstix.org
198.255.187.196	A+PTR	cpe-198-255-187-196.maine.res.rr.com
198.255.187.196	A	remote.abacomputers.com
198.255.187.196	A	somersetbowhunters.com
198.255.188.137	A+PTR	cpe-198-255-188-137.maine.res.rr.com
198.255.188.190	PTR	cpe-198-255-188-190.maine.res.rr.com
198.255.189.153	A	cpe-198-255-189-153.maine.res.rr.com
198.255.191.100	A+PTR	cpe-198-255-191-100.maine.res.rr.com
198.255.191.100	A	usaoneweb.com
198.255.191.100	A	d2.usa1web.com