Robtex

Up: 187.68.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 187.68.20.0/23
Down right: 187.68.22.0/23

IP	Type	Hostname
187.68.21.21	PTR	187-68-21-21.3g.claro.net.br
187.68.21.26	PTR	187-68-21-26.3g.claro.net.br
187.68.21.33	PTR	187-68-21-33.3g.claro.net.br
187.68.21.35	PTR	187-68-21-35.3g.claro.net.br
187.68.21.37	PTR	187-68-21-37.3g.claro.net.br
187.68.21.44	PTR	187-68-21-44.3g.claro.net.br
187.68.21.47	PTR	187-68-21-47.3g.claro.net.br
187.68.21.55	PTR	187-68-21-55.3g.claro.net.br
187.68.21.59	PTR	187-68-21-59.3g.claro.net.br
187.68.21.63	PTR	187-68-21-63.3g.claro.net.br
187.68.21.81	PTR	187-68-21-81.3g.claro.net.br
187.68.21.83	PTR	187-68-21-83.3g.claro.net.br
187.68.21.91	PTR	187-68-21-91.3g.claro.net.br
187.68.21.123	PTR	187-68-21-123.3g.claro.net.br
187.68.21.125	PTR	187-68-21-125.3g.claro.net.br
187.68.21.127	PTR	187-68-21-127.3g.claro.net.br
187.68.21.153	PTR	187-68-21-153.3g.claro.net.br
187.68.21.160	PTR	187-68-21-160.3g.claro.net.br
187.68.21.161	PTR	187-68-21-161.3g.claro.net.br
187.68.21.183	PTR	187-68-21-183.3g.claro.net.br
187.68.21.194	PTR	187-68-21-194.3g.claro.net.br
187.68.21.197	PTR	187-68-21-197.3g.claro.net.br
187.68.21.199	PTR	187-68-21-199.3g.claro.net.br
187.68.21.213	PTR	187-68-21-213.3g.claro.net.br
187.68.21.215	PTR	187-68-21-215.3g.claro.net.br
187.68.21.222	PTR	187-68-21-222.3g.claro.net.br
187.68.21.228	PTR	187-68-21-228.3g.claro.net.br
187.68.21.236	PTR	187-68-21-236.3g.claro.net.br
187.68.21.237	PTR	187-68-21-237.3g.claro.net.br
187.68.21.247	PTR	187-68-21-247.3g.claro.net.br
187.68.21.249	PTR	187-68-21-249.3g.claro.net.br
187.68.21.250	PTR	187-68-21-250.3g.claro.net.br
187.68.21.251	PTR	187-68-21-251.3g.claro.net.br
187.68.22.2	PTR	187-68-22-2.3g.claro.net.br
187.68.22.199	PTR	187-68-22-199.3g.claro.net.br