Robtex

Up: 210.6.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 210.6.216.0/23
Down right: 210.6.218.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
210.6.216.13	A+PTR	210006216013.ctinets.com
210.6.216.14	A+PTR	210006216014.ctinets.com
210.6.216.17	A	210006216017.ctinets.com
210.6.216.27	A+PTR	210006216027.ctinets.com
210.6.216.29	A+PTR	210006216029.ctinets.com
210.6.216.48	A+PTR	210006216048.ctinets.com
210.6.216.57	A+PTR	210006216057.ctinets.com
210.6.216.59	A	liebaowang.com
210.6.216.73	A	210006216073.ctinets.com
210.6.216.77	A	210006216077.ctinets.com
210.6.216.98	A+PTR	210006216098.ctinets.com
210.6.216.112	A+PTR	210006216112.ctinets.com
210.6.216.117	A+PTR	210006216117.ctinets.com
210.6.216.118	A+PTR	210006216118.ctinets.com
210.6.216.120	A	210006216120.ctinets.com
210.6.216.128	A	210006216128.ctinets.com
210.6.216.146	A+PTR	210006216146.ctinets.com
210.6.216.147	PTR	210006216147.ctinets.com
210.6.216.147	A	mail.segmentationfault.info
210.6.216.153	A+PTR	210006216153.ctinets.com
210.6.216.155	A+PTR	210006216155.ctinets.com
210.6.216.156	A+PTR	210006216156.ctinets.com
210.6.216.165	A+PTR	210006216165.ctinets.com
210.6.216.167	A+PTR	210006216167.ctinets.com
210.6.216.171	A	210006216171.ctinets.com
210.6.216.172	A+PTR	210006216172.ctinets.com
210.6.216.180	A+PTR	210006216180.ctinets.com
210.6.216.185	A	karenalex.biz
210.6.216.195	A	210006216195.ctinets.com
210.6.216.196	A+PTR	210006216196.ctinets.com
210.6.216.201	A+PTR	210006216201.ctinets.com
210.6.216.203	A+PTR	210006216203.ctinets.com
210.6.216.207	A+PTR	210006216207.ctinets.com
210.6.216.234	A+PTR	210006216234.ctinets.com
210.6.216.235	A+PTR	210006216235.ctinets.com
210.6.216.241	A	210006216241.ctinets.com
210.6.217.50	A	210006217050.ctinets.com
210.6.217.143	A	210006217143.ctinets.com
210.6.217.149	A	210006217149.ctinets.com
210.6.217.161	A	210006217161.ctinets.com
210.6.217.173	A	210006217173.ctinets.com
210.6.217.195	A	210006217195.ctinets.com
210.6.217.205	A	210006217205.ctinets.com
210.6.218.49	A	210006218049.ctinets.com
210.6.218.76	A	210006218076.ctinets.com
210.6.218.126	A	210006218126.ctinets.com
210.6.218.132	A	210006218132.ctinets.com
210.6.218.141	A	mail.laishunholdings.com
210.6.218.141	A	sunyin-trading.com
210.6.218.141	A	mail.honfung.com
210.6.218.145	A	jcloriental.com
210.6.218.162	A	210006218162.ctinets.com
210.6.218.170	A+PTR	210006218170.ctinets.com
210.6.218.171	A+PTR	210006218171.ctinets.com
210.6.218.174	A+PTR	210006218174.ctinets.com
210.6.218.174	A	wingbest.com.hk
210.6.218.174	A	intwaterproof.com
210.6.218.250	A	210006218250.ctinets.com
210.6.219.20	A	210006219020.ctinets.com
210.6.219.81	A	210006219081.ctinets.com
210.6.219.109	A	188-138-188-234.starnet.md
210.6.219.146	A	210006219146.ctinets.com
210.6.219.165	A	210006219165.ctinets.com