Robtex

Up: 115.73.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 115.73.248.0/22
Down right: 115.73.252.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
115.73.248.61	PTR	adsl.viettel.vn
115.73.248.65	PTR	adsl.viettel.vn
115.73.252.71	A	dirihle.uhnhe.com
115.73.252.71	A	cafr.uhnhe.com
115.73.252.71	A	web09.uhnhe.com
115.73.252.232	PTR	adsl.viettel.vn
115.73.253.123	PTR	adsl.viettel.vn
115.73.253.210	PTR	adsl.viettel.vn
115.73.254.150	PTR	adsl.viettel.vn
115.73.255.57	PTR	adsl.viettel.vn
115.73.255.68	PTR	adsl.viettel.vn
115.73.255.108	PTR	adsl.viettel.vn
115.73.255.170	PTR	adsl.viettel.vn
115.73.255.212	PTR	adsl.viettel.vn
115.73.255.255	PTR	adsl.viettel.vn