Robtex

Up: 203.120.160.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.120.164.0/23
Down right: 203.120.166.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.120.164.189	A	smtpsg03.cimb.com
203.120.164.194	PTR	mail1.teraoka.com.sg
203.120.164.199	PTR	mail.teraoka.com.sg
203.120.164.210	PTR	mail8.teraoka.com.sg
203.120.164.220	PTR	mail9.teraoka.com.sg
203.120.165.44	A	secmail.ktp.com.sg
203.120.165.46	A+PTR	webmail.ktp.com.sg
203.120.165.243	PTR	mail.tripower.com.sg
203.120.166.10	PTR	neptune.eportofsingapore.com
203.120.166.10	PTR	neptune.esingaporeport.com
203.120.166.10	PTR	neptune.portofsingaporemag.com
203.120.166.11	PTR	mpa.gov.sg
203.120.166.11	PTR	mpacom.mpa.gov.sg
203.120.166.15	PTR	hermes.mpa.gov.sg
203.120.166.20	PTR	mpa-opal1.mpa.gov.sg
203.120.166.22	A	mpaln5.mpa.gov.sg
203.120.166.23	PTR	mercury.mpa.gov.sg
203.120.166.40	PTR	eportofsingapore.com
203.120.166.40	PTR	esingaporeport.com
203.120.166.40	PTR	portofsingaporemag.com