Robtex

Up: 203.123.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.123.44.0/23
Down right: 203.123.46.0/23

IP	Type	Hostname
203.123.44.22	PTR	203.123.44.22.reverse.spectranet.in
203.123.44.22	A	mumbaispeedtest.spectra.co
203.123.44.76	PTR	mail2.kamaschachter.com
203.123.45.12	PTR	ca-mod12-b2.spectranet.com
203.123.45.12	A	pkop.cn
203.123.45.12	A	*.mt247.com
203.123.46.85	PTR	203.123.46.85.reverse.spectranet.in
203.123.46.85	A	www.ncmsl.com
203.123.46.86	PTR	203.123.46.86.reverse.spectranet.in
203.123.46.86	A	mail.ncml.com
203.123.46.86	A	mail.ncmsl.com
203.123.46.87	PTR	203.123.46.87.reverse.spectranet.in
203.123.46.90	PTR	webmail.ncml.com
203.123.46.90	A	imap.ncml.com
203.123.46.123	PTR	203.123.46.123.reverse.spectranet.in
203.123.46.180	A	webmail.hdipak.com
203.123.46.196	PTR	203.123.46.196.reverse.spectranet.in
203.123.46.240	PTR	203.123.46.240.reverse.spectranet.in
203.123.46.242	PTR	mail.naprodgroup.com
203.123.46.242	A	mail.vanquestpharma.com
203.123.46.242	A	mail.medorbistrade.com
203.123.47.19	A+PTR	zmx0mum.worldgate.in
203.123.47.20	A+PTR	zmx022.wg3cf3ct.work
203.123.47.88	PTR	203.123.47.88.reverse.spectranet.in
203.123.47.118	PTR	203.123.47.118.reverse.spectranet.in
203.123.47.118	A	fusionemm.verixo.net
203.123.47.213	A	in.thomascook.com
203.123.47.255	PTR	203.123.47.255.reverse.spectranet.in