Robtex

Up: 173.20.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.20.144.0/21
Down right: 173.20.152.0/21

IP	Type	Hostname
173.20.144.35	A+PTR	173-20-144-35.client.mchsi.com
173.20.144.35	A	cody994.com
173.20.144.83	A+PTR	173-20-144-83.client.mchsi.com
173.20.144.130	A+PTR	173-20-144-130.client.mchsi.com
173.20.144.130	A	andrewswiston.com
173.20.144.148	A	mail.esavarese.com
173.20.145.59	A+PTR	173-20-145-59.client.mchsi.com
173.20.145.61	A	mail.mattfordham.com
173.20.145.76	A+PTR	173-20-145-76.client.mchsi.com
173.20.145.95	A	drossi.net
173.20.145.99	A	firewall.parsoli.net
173.20.145.106	A	173-20-145-106.client.mchsi.com
173.20.145.119	A+PTR	173-20-145-119.client.mchsi.com
173.20.145.193	A+PTR	173-20-145-193.client.mchsi.com
173.20.145.239	A+PTR	173-20-145-239.client.mchsi.com
173.20.146.230	A	173-20-146-230.client.mchsi.com
173.20.147.5	A+PTR	173-20-147-5.client.mchsi.com
173.20.147.16	A+PTR	173-20-147-16.client.mchsi.com
173.20.148.126	PTR	173-20-148-126.client.mchsi.com
173.20.148.167	A	mailserver.bencalusinski.com
173.20.148.167	A	mail.iscuba2.com
173.20.148.167	A	marissacalusinski.com
173.20.148.240	A	mail.rasmussenhome.net
173.20.149.104	A+PTR	173-20-149-104.client.mchsi.com
173.20.149.251	A+PTR	173-20-149-251.client.mchsi.com
173.20.149.251	A	lawsondevelopment.net
173.20.151.140	A	173-20-151-140.client.mchsi.com
173.20.151.141	PTR	173-20-151-141.client.mchsi.com
173.20.151.163	PTR	173-20-151-163.client.mchsi.com
173.20.151.254	PTR	173-20-151-254.client.mchsi.com
173.20.152.1	A+PTR	173-20-152-1.client.mchsi.com
173.20.152.54	A	173-20-152-54.client.mchsi.com
173.20.152.207	A	173-20-152-207.client.mchsi.com
173.20.152.239	A	173-20-152-239.client.mchsi.com
173.20.153.0	PTR	173-20-153-0.client.mchsi.com
173.20.153.155	A	173-20-153-155.client.mchsi.com
173.20.153.188	A+PTR	173-20-153-188.client.mchsi.com
173.20.154.29	A+PTR	173-20-154-29.client.mchsi.com
173.20.154.204	A+PTR	173-20-154-204.client.mchsi.com
173.20.155.249	A+PTR	173-20-155-249.client.mchsi.com
173.20.156.52	A	173-20-156-52.client.mchsi.com
173.20.156.96	A+PTR	173-20-156-96.client.mchsi.com
173.20.156.254	A	173-20-156-254.client.mchsi.com
173.20.157.58	A	mail.rasmussenhome.net
173.20.157.88	A	173-20-157-88.client.mchsi.com
173.20.157.99	A+PTR	173-20-157-99.client.mchsi.com
173.20.157.105	A	173-20-157-105.client.mchsi.com
173.20.157.206	A	173-20-157-206.client.mchsi.com
173.20.157.241	PTR	173-20-157-241.client.mchsi.com
173.20.158.6	A	173-20-158-6.client.mchsi.com
173.20.158.30	A	173-20-158-30.client.mchsi.com
173.20.158.36	A	173-20-158-36.client.mchsi.com
173.20.158.38	A	173-20-158-38.client.mchsi.com
173.20.158.43	A	173-20-158-43.client.mchsi.com
173.20.158.56	A	173-20-158-56.client.mchsi.com
173.20.158.76	A	173-20-158-76.client.mchsi.com
173.20.158.81	A+PTR	173-20-158-81.client.mchsi.com
173.20.158.89	A	173-20-158-89.client.mchsi.com
173.20.158.92	A	173-20-158-92.client.mchsi.com
173.20.158.101	A	173-20-158-101.client.mchsi.com
173.20.158.102	A	173-20-158-102.client.mchsi.com
173.20.158.103	A	173-20-158-103.client.mchsi.com
173.20.158.113	A+PTR	173-20-158-113.client.mchsi.com
173.20.158.117	A	173-20-158-117.client.mchsi.com
173.20.158.124	A	173-20-158-124.client.mchsi.com
173.20.158.130	A+PTR	173-20-158-130.client.mchsi.com
173.20.158.134	A	173-20-158-134.client.mchsi.com
173.20.158.150	A	173-20-158-150.client.mchsi.com
173.20.158.154	A	173-20-158-154.client.mchsi.com
173.20.158.158	A	173-20-158-158.client.mchsi.com
173.20.158.161	A+PTR	173-20-158-161.client.mchsi.com
173.20.158.176	A+PTR	173-20-158-176.client.mchsi.com
173.20.158.182	A	173-20-158-182.client.mchsi.com
173.20.158.186	A	173-20-158-186.client.mchsi.com
173.20.158.199	A	173-20-158-199.client.mchsi.com
173.20.158.210	A+PTR	173-20-158-210.client.mchsi.com
173.20.158.211	A+PTR	173-20-158-211.client.mchsi.com
173.20.158.212	A	173-20-158-212.client.mchsi.com
173.20.158.218	A	173-20-158-218.client.mchsi.com
173.20.158.227	A+PTR	173-20-158-227.client.mchsi.com
173.20.158.246	A	173-20-158-246.client.mchsi.com
173.20.158.255	A	173-20-158-255.client.mchsi.com
173.20.159.15	A+PTR	173-20-159-15.client.mchsi.com
173.20.159.59	A	173-20-159-59.client.mchsi.com
173.20.159.202	A	173-20-159-202.client.mchsi.com