Robtex

Up: 115.79.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 115.79.32.0/23
Down right: 115.79.34.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
115.79.32.7	A	vnbookstore.com
115.79.32.7	A	thegioimoidesign.com
115.79.32.7	A	nvhsv.org.vn
115.79.32.52	A	anphuhouse.com
115.79.32.52	A	hanhtrinhdatviet.com
115.79.32.52	A	phongthuyhoc66.com
115.79.32.79	A+PTR	rsivn.com
115.79.32.79	PTR	mail.rsivn.com
115.79.32.79	A+PTR	rosaco.com.vn
115.79.32.92	A	mail.tunghinhhotel.com
115.79.32.96	A	shpt.com.vn
115.79.33.18	PTR	adsl.viettel.vn
115.79.33.31	PTR	adsl.viettel.vn
115.79.33.40	PTR	adsl.viettel.vn
115.79.33.46	PTR	adsl.viettel.vn
115.79.33.49	PTR	adsl.viettel.vn
115.79.33.50	PTR	adsl.viettel.vn
115.79.33.56	PTR	adsl.viettel.vn
115.79.33.70	PTR	adsl.viettel.vn
115.79.33.89	PTR	adsl.viettel.vn
115.79.33.93	PTR	adsl.viettel.vn
115.79.33.120	A	vento.com.vn
115.79.33.126	PTR	adsl.viettel.vn
115.79.33.127	PTR	adsl.viettel.vn
115.79.33.128	PTR	adsl.viettel.vn
115.79.33.186	PTR	adsl.viettel.vn
115.79.33.194	PTR	adsl.viettel.vn
115.79.33.222	PTR	adsl.viettel.vn
115.79.33.238	PTR	adsl.viettel.vn
115.79.33.252	A	mail.guitarfc.net
115.79.33.252	A	thaithinhkhang.com
115.79.33.253	PTR	adsl.viettel.vn
115.79.34.88	A	*.lanrungresort.com
115.79.34.88	A	mail.lanrungresort.com
115.79.34.89	PTR	adsl.viettel.vn
115.79.34.89	A	webmail.adtdecor.com.vn
115.79.34.99	PTR	adsl.viettel.vn
115.79.34.100	PTR	adsl.viettel.vn
115.79.34.107	PTR	adsl.viettel.vn
115.79.34.108	A	appertizr.com
115.79.34.125	PTR	adsl.viettel.vn
115.79.34.155	PTR	adsl.viettel.vn
115.79.34.167	PTR	adsl.viettel.vn
115.79.34.167	A	go1staging.com
115.79.34.185	PTR	adsl.viettel.vn
115.79.34.206	PTR	adsl.viettel.vn
115.79.34.212	PTR	adsl.viettel.vn
115.79.34.238	A	giatot5giay.com
115.79.34.243	PTR	adsl.viettel.vn
115.79.35.1	PTR	adsl.viettel.vn
115.79.35.119	PTR	adsl.viettel.vn
115.79.35.142	PTR	adsl.viettel.vn
115.79.35.204	PTR	adsl.viettel.vn
115.79.35.204	A	adtcorp.net