Robtex

Up: 193.138.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 193.138.144.0/23
Down right: 193.138.146.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.138.144.5	PTR	dns1.spark.parking-page.net
193.138.144.10	PTR	10.144.138.193.triolan.net
193.138.144.32	PTR	32.144.138.193.triolan.net
193.138.144.87	PTR	dns1.spark.parking-page.net
193.138.144.253	PTR	253.144.138.193.triolan.net
193.138.144.253	A	kharkiv.speedtest.triolan.com.ua
193.138.146.2	PTR	dns1.spark.parking-page.net
193.138.146.2	A	nz.com.ua
193.138.146.26	A	mail.rdruzhchenko.com
193.138.146.26	A	rdruzhchenko.com
193.138.146.29	A+PTR	merlin.org.ua
193.138.146.29	A	aroundapple.com
193.138.146.29	A	svetlada.com
193.138.146.191	PTR	191.146.138.193.triolan.net