Robtex

Up: 66.129.128.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 66.129.160.0/20
Down right: 66.129.176.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.129.160.3	A	vpn.prepanetworks.net
66.129.160.5	A	dns.iaespr.net
66.129.160.5	A	dns.iaespr.com
66.129.160.6	A	dns2.iaespr.com
66.129.160.8	A	smtp.prepa-networks.net
66.129.160.40	PTR	iaespr.com
66.129.160.40	A+PTR	dnsmaster.prepa-networks.net
66.129.160.45	A+PTR	mail-old.prepanetworks.net
66.129.160.45	A+PTR	mail.prepa-networks.info
66.129.160.45	A	smtp.prepa-networks.net
66.129.160.135	A	dns2.dde.pr
66.129.160.135	A	dns1.dde.pr
66.129.160.139	A	jmitservicespr.com
66.129.160.139	A	danielroa.net
66.129.161.162	PTR	webmail.bestlifepr.com
66.129.161.162	PTR	webmail.cardonairizarry.com
66.129.161.162	PTR	webmail.devampr.com
66.129.161.254	PTR	hiltonengineering.com
66.129.161.254	A+PTR	neptunomedia.com
66.129.161.254	PTR	www.cardona-irizarry.com
66.129.162.15	A	billing.tropinet.net
66.129.162.66	A	teletekpr.com
66.129.162.254	A	edificapsc.com
66.129.163.11	A	jsolutionspr.com
66.129.163.11	A	gitconsultingpr.com
66.129.163.11	A	willequalspower.com
66.129.163.162	PTR	66-129-163-162.osnetpr.com
66.129.163.162	A	terminal.fdhp.org
66.129.164.132	A	casyp.ocpr.gov.pr
66.129.164.140	PTR	mail.ocpr.gov
66.129.164.140	PTR	mail.ocpr.gov.pr
66.129.164.140	PTR	ocpr-sd22524.ocpr.gov.pr
66.129.164.142	A	casypweb.ocpr.gov.pr
66.129.164.142	A	casypweb.ocpr.gov
66.129.164.251	A	solicitudcontratos.ocpr.gov
66.129.166.3	PTR	ns3.aeepr.com.166.129.66.in-addr.arpa
66.129.166.3	PTR	ns3.prepa.com.166.129.66.in-addr.arpa
66.129.166.3	A	ns3.aeepr.com
66.129.166.4	A	ns4.aeepr.com
66.129.166.4	A	ns7.prepa.com
66.129.166.11	A	mail.prepa.com
66.129.166.34	PTR	scm1.aeepr.com.166.129.66.in-addr.arpa
66.129.166.34	PTR	scm1.prepa.com.166.129.66.in-addr.arpa
66.129.166.34	A	scm1.aeepr.com
66.129.166.35	PTR	scm3.aeepr.com.166.129.66.in-addr.arpa
66.129.166.35	PTR	scm3.prepa.com.166.129.66.in-addr.arpa
66.129.166.35	A	scm3.prepa.com
66.129.166.70	A	lync-srv1.prepa.com
66.129.166.81	A	eng-topcon.prepa.com
66.129.166.90	A	secureftp.prepa.com
66.129.166.129	A	www.aeepr.com
66.129.166.135	A	micuenta.prepa.com
66.129.166.217	A	appm01.prepa.com
66.129.166.222	A	prepa.com
66.129.166.240	A+PTR	vpn.aeepr.com
66.129.166.240	A+PTR	vpn.prepa.com
66.129.169.98	A	www.helvetia-pr.com
66.129.171.18	PTR	dns11.parkpage.foundationapi.com
66.129.171.18	A	speedtest01.prepanetworks.net
66.129.171.18	A	speedtest03.prepanetworks.net
66.129.171.98	A	mail.fedeltapr.com
66.129.172.179	PTR	dns11.parkpage.foundationapi.com
66.129.172.179	A	btdirector.bank-trust.com
66.129.174.5	PTR	ns6.aeepr.com.174.129.66.in-addr.arpa
66.129.174.5	PTR	ns6.prepa.com.174.129.66.in-addr.arpa
66.129.174.5	A	ns6.aeepr.com
66.129.174.11	A	mail.prepa.com
66.129.174.17	A	www2.aeepr.com
66.129.174.34	PTR	scm2.aeepr.com.174.129.66.in-addr.arpa
66.129.174.34	PTR	scm2.prepa.com.174.129.66.in-addr.arpa
66.129.174.34	A	scm2.aeepr.com
66.129.174.35	A	scm4.aeepr.com
66.129.174.35	A	scm4.prepa.com
66.129.174.241	A+PTR	vpn.aeepr.com
66.129.174.241	A+PTR	vpn.prepa.com
66.129.175.51	A	hospiciosanlucas.com
66.129.175.100	A	hogar-crea.org
66.129.175.100	A	marconcorp.com
66.129.175.100	A	diananieto.com