Robtex

Up: 125.234.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 125.234.20.0/25
Down right: 125.234.20.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
125.234.20.54	A	tiepthiso.net
125.234.20.54	A	mail.tiepthiso.net
125.234.20.70	PTR	125.234.20.70.hcm.viettel.vn
125.234.20.70	A	vitri.tk
125.234.20.170	PTR	mail.khangthong.vn
125.234.20.170	A	mta.khangthong.net
125.234.20.170	A	mx1.khangthong.net
125.234.20.242	PTR	125.234.20.242.hcm.viettel.vn