Summary
arcor.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. Incoming mail for
arcor.com.ar is handled by two mailservers at
arcor.com.ar themselves. They are on the same IP network.
arcor.es,
dosenuno.cl,
arcor.com.py,
arcor.com.br,
arcor.com.pe and at least two other hosts share both nameservers and mailservers with this domain.
arcor.ec,
eus.net.ar,
arcor.co.uk,
arcornet.com,
cartocor.com and at least 28 other hosts share nameservers with this domain.
converflex.net and
gapregionalservices.com.uy share mailservers with this domain.
www.arcor.com.ar,
b2b.arcor.com.ar,
ecap.arcor.com.ar,
ecup.arcor.com.ar,
ffijo.arcor.com.ar and at least 17 other hosts are subdomains to this hostname.
com.ar is a domain controlled by six nameservers. All of them are on different IP networks.