Robtex

Up: 27.33.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 27.33.29.0/25
Down right: 27.33.29.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
27.33.29.4	PTR	27-33-29-4.static.tpgi.com.au
27.33.29.4	A	smtp.mnxnu.com
27.33.29.4	A	mail.131mail.com
27.33.29.224	A+PTR	27-33-29-224.static.tpgi.com.au
27.33.29.224	A	subtlesoft.com
27.33.29.224	A	mail.subtlesoft.com