Robtex

Up: 203.19.158.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.19.159.0/25
Down right: 203.19.159.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.19.159.6	A+PTR	mail.aaacomp.com.au
203.19.159.7	PTR	mail.acaciaindustries.com.au
203.19.159.8	A+PTR	mail.aigardens.com.au
203.19.159.10	A	mail.amscorp.com.au
203.19.159.11	A+PTR	mail.aog.net.au
203.19.159.12	A	mail.ausmix.net.au
203.19.159.13	A+PTR	mail.bbelectrical.com.au
203.19.159.14	A	mail.bellsandwhistles.biz
203.19.159.14	A	bellsandwhistles.biz
203.19.159.17	A+PTR	mail.brackleyindustries.com
203.19.159.19	A+PTR	mail.briot-weco.com.au
203.19.159.19	A+PTR	mail.briotweco.com.au
203.19.159.19	A	mailhost.briotweco.com.au
203.19.159.20	A	mail.byrnes.com.au
203.19.159.21	A	mail.car2214.com
203.19.159.22	A	mail.barrelbros.com.au
203.19.159.23	A	mail.colinbloomfield.com.au
203.19.159.24	A	mail.kareelaaviation.com.au
203.19.159.25	A	mail.coysec.com.au
203.19.159.26	A	mail.creativeairconditioning.com.au
203.19.159.28	A	mail.designmasonry.com.au
203.19.159.29	A+PTR	mail.docuspace.com.au
203.19.159.30	PTR	ehbhs1964.com
203.19.159.30	A+PTR	mail.ehbhs1964.com
203.19.159.30	A+PTR	1964.blogs.mail.ehbhs1964.com
203.19.159.31	A	mail.emcell.com.au
203.19.159.31	A	mail.emcell.net.au
203.19.159.32	A+PTR	mail.floatingworld.net.au
203.19.159.35	A+PTR	mail.hdscientific.com
203.19.159.35	A+PTR	mail.hdscientific.com.au
203.19.159.36	A	mail.hrc.com.au
203.19.159.40	A+PTR	mail.jsag.com.au
203.19.159.42	A	mail.welovfresh.com
203.19.159.46	A	mail.nhup.com.au
203.19.159.47	A+PTR	mail.organicratio.com.au
203.19.159.47	A+PTR	mail.organicratio.com
203.19.159.48	A	mail.psi-aus.net
203.19.159.49	A+PTR	mail.remotebackup.com.au
203.19.159.51	A+PTR	mail.rotaryeng.com.au
203.19.159.53	A	mail.stevebull.com.au
203.19.159.55	A	mail.t12stationery.com.au
203.19.159.56	A+PTR	mail.trideximaging.com.au
203.19.159.59	A	mail.viva-glassware.com.au
203.19.159.60	A+PTR	mail.viva-healthcare.com.au
203.19.159.63	A	mail.alisonfield.com
203.19.159.188	A+PTR	crosscountry.com.au
203.19.159.188	A+PTR	crosscountry.net.au
203.19.159.188	PTR	webserv1.crosscountry.com.au
203.19.159.217	A	yarral.html.com.au
203.19.159.237	PTR	mail.tekevent.com
203.19.159.237	PTR	mail.html.com.au
203.19.159.237	PTR	mail.crosscountry.net.au
203.19.159.238	A+PTR	newmaang.html.com.au
203.19.159.239	A+PTR	brackley-industries.com
203.19.159.239	PTR	ehbhs1964.com
203.19.159.239	PTR	pigleo.com
203.19.159.241	A+PTR	birik.html.com.au
203.19.159.241	A	briotweco.com.au
203.19.159.241	A	briot-weco.com.au
203.19.159.245	A	html.net.au
203.19.159.248	A+PTR	maang.html.com.au
203.19.159.248	A	html.com.au
203.19.159.248	A	ns1.html.com.au