Robtex

Up: 203.190.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.190.0.0/23
Down right: 203.190.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.190.0.1	A+PTR	pradeshta.net
203.190.0.1	PTR	prdshta.pradeshta.net
203.190.0.1	A	s18.pradeshta.net
203.190.0.2	PTR	office.pradeshta.net
203.190.0.2	A	www.seu.ac.bd
203.190.0.4	A+PTR	ns1.pradeshta.com
203.190.0.4	A	pradeshta.com
203.190.0.4	A	ns2.pradeshta.com
203.190.0.13	PTR	rs27.b13.pradeshta.net
203.190.0.18	PTR	my.seu.ac.bd
203.190.0.18	A	netmatrixsolution.com
203.190.0.19	PTR	seu.seu.ac.bd
203.190.0.21	PTR	ns1.pradeshta.com
203.190.0.28	A	smtp.seu.ac.bd
203.190.0.35	A+PTR	noc1.pradeshta.net
203.190.0.40	A	noc3.pradeshta.net
203.190.0.41	PTR	ew1.banani.pradeshta.net
203.190.0.42	A+PTR	www.pradeshta.net
203.190.0.42	PTR	ew2.banani.pradeshta.net
203.190.0.139	A+PTR	mx.seu.ac.bd
203.190.0.140	A	seu.seu.ac.bd
203.190.0.140	A	mail.seu.ac.bd
203.190.0.140	A	seu.ac.bd
203.190.0.165	A	mail.smuct.edu.bd
203.190.0.181	A	ns10.danaengineersbd.com
203.190.0.181	A	danaengineersbd.com
203.190.0.184	A	ns4.danastyles.com
203.190.0.186	PTR	ns3.danagrpbd.com
203.190.0.187	A+PTR	ns1.europcarbd.com
203.190.0.187	A	www.europcarbd.com
203.190.0.187	A	europcarbd.com
203.190.0.188	A+PTR	ns1.danasweater.com
203.190.0.188	A	danaaviation.com
203.190.0.188	A	ns1.danaaviation.com
203.190.1.140	PTR	myhosting.sambd.com
203.190.2.3	A+PTR	dns3.pradeshta.net
203.190.2.81	PTR	mail.geotelbd.com
203.190.3.1	PTR	ns1.msltechbd.net
203.190.3.1	A	mail.inetbd.net
203.190.3.1	A	mail.deporosh.com
203.190.3.34	A+PTR	ns3.danagrpbd.com
203.190.3.35	PTR	ns10.danaengineersbd.com
203.190.3.35	A	danaengineersbd.com
203.190.3.37	PTR	ns1.europcarbd.com