yfu.org.ar is a domain controlled by two nameservers at iplanisp.com.ar. They are on the same IP network. Incoming mail for yfu.org.ar is handled by one mailserver at yfu.org.ar themselves. gpl.com.ar, myx.travel, rhm.com.uy, 3way.com.ar, vncl.com.ar and at least 56 other hosts share nameservers with this domain. mail.yfu.org.ar are subdomains to this hostname. org.ar is delegated to six nameservers, however one delegated nameserver is missing in the zone. All of them are on different IP networks.