arcornet.com.ar is delegated to two nameservers, however one extra nameserver is listed in the zone. Two of them are on the same IP network. arcor.ec, arcor.es, arcor.com, eus.net.ar, arcor.co.uk and at least 35 other hosts share nameservers with this domain. www.arcornet.com.ar are subdomains to this hostname. com.ar is a domain controlled by six nameservers. All of them are on different IP networks.