Robtex

Up: 193.91.12.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 193.91.12.0/24
Down right: 193.91.13.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.91.13.10	PTR	star.gd-net.pl
193.91.13.10	A	mail.gimbol.wejher.pl
193.91.13.11	PTR	mail.oknet.pl
193.91.13.16	A	www.liceum1.wejher.pl
193.91.13.16	A	www.sp9.wejherowo.pl
193.91.13.16	A	www.hotel-golabek.leb.pl
193.91.13.19	PTR	da.oknet.pl
193.91.13.19	A	www.psm.wejher.pl
193.91.13.21	PTR	mail.propox.com