Robtex

Up: 181.192.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 181.192.32.0/20
Down right: 181.192.48.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
181.192.35.85	PTR	host-181-192-35-85.telered.com.ar
181.192.35.171	PTR	host-181-192-35-171.telered.com.ar
181.192.36.2	PTR	host-181-192-36-2.telered.com.ar
181.192.37.83	PTR	host-181-192-37-83.telered.com.ar
181.192.38.37	PTR	host-181-192-38-37.telered.com.ar
181.192.40.148	PTR	host-181-192-40-148.telered.com.ar
181.192.43.35	PTR	host-181-192-43-35.telered.com.ar
181.192.47.127	PTR	host-181-192-47-127.telered.com.ar
181.192.53.34	PTR	host-181-192-53-34.telered.com.ar
181.192.53.123	PTR	host-181-192-53-123.telered.com.ar
181.192.58.22	PTR	host-181-192-58-22.telered.com.ar
181.192.58.22	A	antomar.noip.me
181.192.61.38	PTR	host-181-192-61-38.telered.com.ar
181.192.61.38	A	qdsystems.com.ar
181.192.62.95	PTR	host-181-192-62-95.telered.com.ar
181.192.62.161	PTR	host-181-192-62-161.telered.com.ar
181.192.62.229	PTR	host-181-192-62-229.telered.com.ar
181.192.63.12	PTR	host-181-192-63-12.telered.com.ar
181.192.63.12	A	r1---sn-8xgu8-x1xe.googlevideo.com
181.192.63.12	A	r1.sn-8xgu8-x1xe.googlevideo.com
181.192.63.13	PTR	host-181-192-63-13.telered.com.ar
181.192.63.13	A	r2.sn-8xgu8-x1xe.googlevideo.com
181.192.63.13	A	r2---sn-8xgu8-x1xe.googlevideo.com
181.192.63.15	PTR	host-181-192-63-15.telered.com.ar
181.192.63.130	PTR	host-181-192-63-130.telered.com.ar
181.192.63.130	A	occ-1-690-1952.1.nflxso.net
181.192.63.130	A	ipv4-c001-aep001-telered-isp.1.oca.nflxvideo.net
181.192.63.204	PTR	host-181-192-63-204.telered.com.ar
181.192.63.204	A	r1---sn-8xgu8-x1xl.googlevideo.com
181.192.63.205	PTR	host-181-192-63-205.telered.com.ar
181.192.63.205	A	r2.sn-8xgu8-x1xl.googlevideo.com
181.192.63.205	A	r2---sn-8xgu8-x1xl.googlevideo.com
181.192.63.206	PTR	host-181-192-63-206.telered.com.ar
181.192.63.206	A	r3---sn-8xgu8-x1xl.googlevideo.com
181.192.63.207	PTR	host-181-192-63-207.telered.com.ar