Robtex

Up: 109.87.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 109.87.40.0/23
Down right: 109.87.42.0/23

IP	Type	Hostname
109.87.40.23	PTR	23.40.87.109.triolan.net
109.87.40.156	PTR	156.40.87.109.triolan.net
109.87.40.223	PTR	223.40.87.109.triolan.net
109.87.40.223	A	truecoders.net
109.87.41.17	PTR	17.41.87.109.triolan.net
109.87.41.128	PTR	128.41.87.109.triolan.net
109.87.41.245	PTR	245.41.87.109.triolan.net
109.87.42.32	PTR	32.42.87.109.triolan.net
109.87.42.86	PTR	86.42.87.109.triolan.net
109.87.42.117	PTR	117.42.87.109.triolan.net
109.87.43.0	PTR	0.43.87.109.triolan.net
109.87.43.255	PTR	255.43.87.109.triolan.net