Robtex

Up: 74.112.72.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 74.112.74.0/24
Down right: 74.112.75.0/24

IP	Type	Hostname
74.112.74.46	A	hipaa04.emailspool.com
74.112.74.46	A	hipaa02.emailspool.com
74.112.74.46	A	hipaapool.emailspool.com
74.112.74.101	A	obdns01.myexchangehost.com
74.112.74.102	A	obdns02.myexchangehost.com
74.112.74.103	A+PTR	obad01.myexchangehost.com
74.112.74.103	A	myexchangehost.com
74.112.74.103	A	mail.madisonobgynassociates.com
74.112.74.104	A+PTR	obad02.myexchangehost.com
74.112.74.104	A	myexchangehost.com
74.112.74.104	A	mail.madisonobgynassociates.com
74.112.74.131	A+PTR	dns2.onlinespamsolutions.com
74.112.74.131	A	dns2.isolnet.com
74.112.74.132	A	dns4.onlinespamsolutions.com
74.112.75.11	A	mail.soundwavesdfw.com