Robtex

Up: 119.56.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 119.56.0.0/18
Down right: 119.56.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
119.56.0.3	PTR	3.0.56.119.unknown.m1.com.sg
119.56.8.52	PTR	52.8.56.119.unknown.m1.com.sg
119.56.10.2	PTR	2.10.56.119.unknown.m1.com.sg
119.56.16.131	PTR	131.16.56.119.unknown.m1.com.sg
119.56.18.130	PTR	130.18.56.119.unknown.m1.com.sg
119.56.21.2	PTR	2.21.56.119.unknown.m1.com.sg
119.56.22.2	PTR	2.22.56.119.unknown.m1.com.sg
119.56.22.12	PTR	12.22.56.119.unknown.m1.com.sg
119.56.22.49	PTR	49.22.56.119.unknown.m1.com.sg
119.56.24.13	PTR	13.24.56.119.unknown.m1.com.sg
119.56.27.2	PTR	2.27.56.119.unknown.m1.com.sg
119.56.31.46	PTR	46.31.56.119.unknown.m1.com.sg
119.56.31.46	A	amirtechnology.com
119.56.32.2	PTR	2.32.56.119.unknown.m1.com.sg
119.56.32.36	PTR	36.32.56.119.unknown.m1.com.sg
119.56.32.140	PTR	140.32.56.119.unknown.m1.com.sg
119.56.33.2	PTR	2.33.56.119.unknown.m1.com.sg
119.56.35.8	PTR	8.35.56.119.unknown.m1.com.sg
119.56.35.201	PTR	201.35.56.119.unknown.m1.com.sg
119.56.35.201	A	www.pythonabc.org
119.56.35.201	A	mail.pythonabc.org
119.56.36.2	PTR	2.36.56.119.unknown.m1.com.sg
119.56.37.131	PTR	131.37.56.119.unknown.m1.com.sg
119.56.40.44	PTR	44.40.56.119.unknown.m1.com.sg
119.56.42.71	PTR	71.42.56.119.unknown.m1.com.sg
119.56.42.71	A	vnbsolution.com
119.56.43.1	PTR	1.43.56.119.unknown.m1.com.sg
119.56.43.4	PTR	4.43.56.119.unknown.m1.com.sg
119.56.45.162	PTR	162.45.56.119.unknown.m1.com.sg
119.56.45.162	A	chinyong.tk
119.56.50.129	PTR	129.50.56.119.unknown.m1.com.sg
119.56.50.164	A	www.bentanyy.synology.me
119.56.50.164	A	bentanyy.synology.me
119.56.51.228	A	willsisi.diskstation.me
119.56.51.228	A	www.willsisi.diskstation.me
119.56.52.22	PTR	22.52.56.119.unknown.m1.com.sg
119.56.57.10	PTR	10.57.56.119.unknown.m1.com.sg
119.56.58.174	PTR	174.58.56.119.unknown.m1.com.sg
119.56.58.174	A	weeleeseng.com
119.56.58.174	A	oscarwee.com
119.56.63.51	A	lian88.net
119.56.63.51	A	lian88a.net
119.56.63.248	A	eileenpsh.com
119.56.64.131	PTR	131.64.56.119.unknown.m1.com.sg
119.56.66.180	PTR	180.66.56.119.unknown.m1.com.sg
119.56.66.180	A	applysync.com
119.56.68.69	PTR	69.68.56.119.unknown.m1.com.sg
119.56.68.69	A	yujin.duckdns.org
119.56.68.69	A	www.yujin.duckdns.org
119.56.68.126	PTR	126.68.56.119.unknown.m1.com.sg
119.56.68.126	A	jinnotgin.com
119.56.70.1	PTR	1.70.56.119.unknown.m1.com.sg
119.56.70.4	PTR	4.70.56.119.unknown.m1.com.sg
119.56.70.131	PTR	131.70.56.119.unknown.m1.com.sg
119.56.75.37	PTR	37.75.56.119.unknown.m1.com.sg
119.56.75.39	PTR	39.75.56.119.unknown.m1.com.sg
119.56.77.2	PTR	2.77.56.119.unknown.m1.com.sg
119.56.77.4	PTR	4.77.56.119.unknown.m1.com.sg
119.56.77.70	A	myasus3100.ddns.net
119.56.77.70	A	myreadynas182.ddns.net
119.56.81.130	PTR	130.81.56.119.unknown.m1.com.sg
119.56.81.131	PTR	131.81.56.119.unknown.m1.com.sg
119.56.82.17	PTR	17.82.56.119.unknown.m1.com.sg
119.56.92.2	PTR	2.92.56.119.unknown.m1.com.sg
119.56.96.117	PTR	117.96.56.119.unknown.m1.com.sg
119.56.97.64	PTR	64.97.56.119.unknown.m1.com.sg
119.56.97.110	PTR	110.97.56.119.unknown.m1.com.sg
119.56.97.189	PTR	189.97.56.119.unknown.m1.com.sg
119.56.98.131	PTR	131.98.56.119.unknown.m1.com.sg
119.56.99.38	A	idealcovet.com
119.56.99.39	PTR	39.99.56.119.unknown.m1.com.sg
119.56.99.41	PTR	41.99.56.119.unknown.m1.com.sg
119.56.99.92	PTR	92.99.56.119.unknown.m1.com.sg
119.56.99.164	PTR	164.99.56.119.unknown.m1.com.sg
119.56.100.65	PTR	65.100.56.119.unknown.m1.com.sg
119.56.100.164	PTR	164.100.56.119.unknown.m1.com.sg
119.56.100.186	PTR	186.100.56.119.unknown.m1.com.sg
119.56.101.196	A	buddies-sg.com
119.56.103.254	PTR	254.103.56.119.unknown.m1.com.sg
119.56.104.47	PTR	47.104.56.119.unknown.m1.com.sg
119.56.104.49	PTR	49.104.56.119.unknown.m1.com.sg
119.56.104.93	PTR	93.104.56.119.unknown.m1.com.sg
119.56.105.24	PTR	24.105.56.119.unknown.m1.com.sg
119.56.107.45	PTR	45.107.56.119.unknown.m1.com.sg
119.56.107.184	PTR	184.107.56.119.unknown.m1.com.sg
119.56.108.174	PTR	174.108.56.119.unknown.m1.com.sg
119.56.108.201	PTR	201.108.56.119.unknown.m1.com.sg
119.56.109.91	PTR	91.109.56.119.unknown.m1.com.sg
119.56.109.142	PTR	142.109.56.119.unknown.m1.com.sg
119.56.109.220	PTR	220.109.56.119.unknown.m1.com.sg
119.56.110.13	PTR	13.110.56.119.unknown.m1.com.sg
119.56.110.92	PTR	92.110.56.119.unknown.m1.com.sg
119.56.110.131	PTR	131.110.56.119.unknown.m1.com.sg
119.56.110.158	PTR	158.110.56.119.unknown.m1.com.sg
119.56.110.158	A	light338.com
119.56.110.183	PTR	183.110.56.119.unknown.m1.com.sg
119.56.110.240	PTR	240.110.56.119.unknown.m1.com.sg
119.56.111.247	A	securitemail.securitesg.com
119.56.113.50	A	yxy.homedns.org
119.56.114.131	PTR	131.114.56.119.unknown.m1.com.sg
119.56.115.2	PTR	2.115.56.119.unknown.m1.com.sg
119.56.119.128	PTR	128.119.56.119.unknown.m1.com.sg
119.56.120.128	PTR	128.120.56.119.unknown.m1.com.sg
119.56.120.129	PTR	129.120.56.119.unknown.m1.com.sg
119.56.120.141	PTR	141.120.56.119.unknown.m1.com.sg
119.56.121.130	PTR	130.121.56.119.unknown.m1.com.sg
119.56.123.1	PTR	1.123.56.119.unknown.m1.com.sg
119.56.124.4	PTR	4.124.56.119.unknown.m1.com.sg
119.56.124.131	PTR	131.124.56.119.unknown.m1.com.sg
119.56.125.1	PTR	1.125.56.119.unknown.m1.com.sg
119.56.126.1	PTR	1.126.56.119.unknown.m1.com.sg
119.56.126.128	PTR	128.126.56.119.unknown.m1.com.sg