Robtex

Up: 42.115.240.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 42.115.241.0/25
Down right: 42.115.241.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
42.115.241.163	A	tnteco.vn
42.115.241.167	PTR	email2.tnpvn.com.vn
42.115.241.167	PTR	email2.m1tech.com.vn
42.115.241.167	A+PTR	email2.vone.com.vn
42.115.241.168	PTR	email4.vidgroup.com.vn
42.115.241.168	PTR	email4.tnrholdings.com.vn
42.115.241.168	A+PTR	email4.tnteco.vn
42.115.241.169	A	email.tnginter.com