Robtex

Up: 66.187.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.187.12.0/23
Down right: 66.187.14.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.187.12.17	A+PTR	ppp6618712uu17.chicagonet.net
66.187.12.17	A	www.lawndalenews.com
66.187.12.17	A	lawndalenews.com
66.187.12.20	A	testing.lawndalenews.com
66.187.12.21	A	worldports.com
66.187.12.21	A	ppp6618712uu21.chicagonet.net
66.187.12.23	PTR	ppp6618712uu23.chicagonet.net
66.187.12.23	A	chicagotelecom.com
66.187.12.50	A+PTR	www.terrenosdeventaecuador.com
66.187.12.50	A	mail.terrenosdeventaecuador.com
66.187.12.50	A	terrenosdeventaecuador.com
66.187.12.74	A	ppp6618712uu74.chicagonet.net
66.187.12.88	PTR	smtp.death-web.com
66.187.12.243	A+PTR	ppp6618712uu243.chicagonet.net
66.187.15.7	PTR	ppp6618715uu7.chicagonet.net
66.187.15.8	PTR	ppp6618715uu8.chicagonet.net
66.187.15.12	A	ppp6618715uu12.chicagonet.net
66.187.15.27	A	ppp6618715uu27.chicagonet.net
66.187.15.28	A+PTR	ppp6618715uu28.chicagonet.net
66.187.15.38	PTR	ppp6618715uu38.chicagonet.net
66.187.15.41	A+PTR	ppp6618715uu41.chicagonet.net
66.187.15.43	PTR	ppp6618715uu43.chicagonet.net
66.187.15.53	A+PTR	ppp6618715uu53.chicagonet.net
66.187.15.59	PTR	ppp6618715uu59.chicagonet.net
66.187.15.61	A+PTR	ppp6618715uu61.chicagonet.net
66.187.15.62	A+PTR	ppp6618715uu62.chicagonet.net
66.187.15.68	A+PTR	ppp6618715uu68.chicagonet.net
66.187.15.71	A+PTR	ppp6618715uu71.chicagonet.net
66.187.15.83	A+PTR	ppp6618715uu83.chicagonet.net
66.187.15.85	A+PTR	ppp6618715uu85.chicagonet.net
66.187.15.225	A+PTR	ppp6618715uu225.chicagonet.net
66.187.15.247	A+PTR	ppp6618715uu247.chicagonet.net