Robtex

Up: 110.138.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 110.138.0.0/23
Down right: 110.138.2.0/23

IP	Type	Hostname
110.138.1.1	PTR	1.subnet110-138-1.speedy.telkom.net.id
110.138.1.2	PTR	2.subnet110-138-1.speedy.telkom.net.id
110.138.1.3	PTR	3.subnet110-138-1.speedy.telkom.net.id
110.138.1.5	PTR	5.subnet110-138-1.speedy.telkom.net.id
110.138.1.12	PTR	12.subnet110-138-1.speedy.telkom.net.id
110.138.1.20	PTR	20.subnet110-138-1.speedy.telkom.net.id
110.138.1.121	PTR	121.subnet110-138-1.speedy.telkom.net.id
110.138.1.129	PTR	129.subnet110-138-1.speedy.telkom.net.id
110.138.1.136	PTR	136.subnet110-138-1.speedy.telkom.net.id
110.138.1.168	PTR	168.subnet110-138-1.speedy.telkom.net.id
110.138.1.183	PTR	183.subnet110-138-1.speedy.telkom.net.id
110.138.1.209	PTR	209.subnet110-138-1.speedy.telkom.net.id
110.138.1.211	PTR	211.subnet110-138-1.speedy.telkom.net.id
110.138.1.213	PTR	213.subnet110-138-1.speedy.telkom.net.id
110.138.1.222	PTR	222.subnet110-138-1.speedy.telkom.net.id
110.138.2.18	PTR	18.subnet110-138-2.speedy.telkom.net.id
110.138.2.22	PTR	22.subnet110-138-2.speedy.telkom.net.id
110.138.2.80	PTR	80.subnet110-138-2.speedy.telkom.net.id
110.138.2.81	PTR	81.subnet110-138-2.speedy.telkom.net.id
110.138.2.108	PTR	108.subnet110-138-2.speedy.telkom.net.id
110.138.2.207	PTR	207.subnet110-138-2.speedy.telkom.net.id
110.138.2.225	PTR	225.subnet110-138-2.speedy.telkom.net.id
110.138.3.13	PTR	13.subnet110-138-3.speedy.telkom.net.id
110.138.3.31	PTR	31.subnet110-138-3.speedy.telkom.net.id
110.138.3.79	PTR	79.subnet110-138-3.speedy.telkom.net.id
110.138.3.88	PTR	88.subnet110-138-3.speedy.telkom.net.id
110.138.3.90	PTR	90.subnet110-138-3.speedy.telkom.net.id
110.138.3.101	PTR	101.subnet110-138-3.speedy.telkom.net.id
110.138.3.190	PTR	190.subnet110-138-3.speedy.telkom.net.id