Robtex

Up: 173.27.80.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 173.27.80.0/22
Down right: 173.27.84.0/22

IP	Type	Hostname
173.27.80.206	A+PTR	173-27-80-206.client.mchsi.com
173.27.81.1	A+PTR	173-27-81-1.client.mchsi.com
173.27.81.13	A	173-27-81-13.client.mchsi.com
173.27.81.15	A	173-27-81-15.client.mchsi.com
173.27.81.26	A+PTR	173-27-81-26.client.mchsi.com
173.27.81.32	A+PTR	173-27-81-32.client.mchsi.com
173.27.81.61	A	173-27-81-61.client.mchsi.com
173.27.81.65	A+PTR	173-27-81-65.client.mchsi.com
173.27.81.74	A+PTR	173-27-81-74.client.mchsi.com
173.27.81.88	A	173-27-81-88.client.mchsi.com
173.27.81.92	A	173-27-81-92.client.mchsi.com
173.27.81.93	A	173-27-81-93.client.mchsi.com
173.27.81.100	A	173-27-81-100.client.mchsi.com
173.27.81.102	A	173-27-81-102.client.mchsi.com
173.27.81.112	A+PTR	173-27-81-112.client.mchsi.com
173.27.81.114	A+PTR	173-27-81-114.client.mchsi.com
173.27.81.148	A	173-27-81-148.client.mchsi.com
173.27.81.176	A+PTR	173-27-81-176.client.mchsi.com
173.27.81.180	A	173-27-81-180.client.mchsi.com
173.27.81.181	A	173-27-81-181.client.mchsi.com
173.27.81.209	A+PTR	173-27-81-209.client.mchsi.com
173.27.81.222	A	173-27-81-222.client.mchsi.com
173.27.81.223	A	173-27-81-223.client.mchsi.com
173.27.81.232	A+PTR	173-27-81-232.client.mchsi.com
173.27.81.234	A+PTR	173-27-81-234.client.mchsi.com
173.27.81.235	A+PTR	173-27-81-235.client.mchsi.com
173.27.81.241	A+PTR	173-27-81-241.client.mchsi.com
173.27.81.247	A	173-27-81-247.client.mchsi.com
173.27.83.178	A+PTR	173-27-83-178.client.mchsi.com
173.27.84.232	A	ldap.ldsnetsaf.com
173.27.85.51	A+PTR	173-27-85-51.client.mchsi.com
173.27.85.97	PTR	173-27-85-97.client.mchsi.com
173.27.85.205	A	173-27-85-205.client.mchsi.com
173.27.85.218	A+PTR	173-27-85-218.client.mchsi.com
173.27.85.235	A+PTR	173-27-85-235.client.mchsi.com
173.27.86.240	A	deadweek.com
173.27.87.59	A	173-27-87-59.client.mchsi.com
173.27.87.62	A	173-27-87-62.client.mchsi.com
173.27.87.127	A	173-27-87-127.client.mchsi.com
173.27.87.194	A+PTR	173-27-87-194.client.mchsi.com