Robtex

Up: 27.76.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 27.76.128.0/18
Down right: 27.76.192.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.76.128.50	PTR	localhost
27.76.131.68	PTR	localhost
27.76.131.206	PTR	localhost
27.76.132.74	PTR	localhost
27.76.132.124	PTR	localhost
27.76.135.238	PTR	localhost
27.76.136.251	PTR	localhost
27.76.136.251	A	thuviensohict.com
27.76.137.22	PTR	localhost
27.76.137.22	A	antiepivn.goertek.com
27.76.137.66	PTR	localhost
27.76.137.66	A	trading.pinetree.vn
27.76.138.30	PTR	localhost
27.76.139.119	PTR	localhost
27.76.143.60	PTR	localhost
27.76.151.73	PTR	localhost
27.76.160.75	PTR	localhost
27.76.160.75	A	mail.congapro.info
27.76.160.75	A	www.congapro.info
27.76.161.35	PTR	localhost
27.76.163.83	PTR	localhost
27.76.172.112	PTR	localhost
27.76.172.112	A	dvcbqlkcn.hungyen.gov.vn
27.76.174.60	PTR	localhost
27.76.179.26	PTR	localhost
27.76.180.123	PTR	localhost
27.76.181.113	PTR	localhost
27.76.181.194	PTR	localhost
27.76.185.164	PTR	localhost
27.76.186.237	PTR	localhost
27.76.188.180	PTR	localhost
27.76.192.41	PTR	localhost
27.76.192.142	PTR	localhost
27.76.192.147	A	thuytuyen.tk
27.76.194.173	A	caruireland.com
27.76.194.248	PTR	localhost
27.76.200.175	PTR	localhost
27.76.202.232	PTR	localhost
27.76.206.233	PTR	localhost
27.76.208.51	PTR	localhost
27.76.210.192	PTR	localhost
27.76.214.8	A	10langha.homeip.net
27.76.219.97	PTR	localhost
27.76.224.135	PTR	localhost
27.76.232.25	PTR	localhost
27.76.233.103	PTR	localhost
27.76.235.3	PTR	localhost
27.76.236.89	PTR	localhost
27.76.239.1	PTR	localhost
27.76.241.122	PTR	localhost
27.76.241.192	PTR	localhost
27.76.246.203	A	hometeddy.dlinkddns.com
27.76.247.216	PTR	localhost
27.76.249.20	PTR	localhost
27.76.250.145	PTR	localhost
27.76.252.251	PTR	localhost
27.76.255.84	PTR	localhost