Robtex

Up: 103.90.208.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.90.212.0/23
Down right: 103.90.214.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.90.212.34	A+PTR	ns1.dbtec.com.bd
103.90.212.35	A+PTR	ns2.dbtec.com.bd
103.90.212.37	A+PTR	mail.dbtec.com.bd
103.90.212.37	A+PTR	vmail.dbtec.com.bd
103.90.212.37	A	www.dbtec.com.bd
103.90.212.138	PTR	fip4c138.dbtec.com.bd