ns1.acer.com has one IP number , which also has a corresponding reverse pointer. ns2.acer-euro.com point to the same IP. acer.kz, acer.es, acer.sk, acer.cz, acer.gr and at least 100 other hosts use this as a nameserver. acer.com is a domain controlled by six nameservers at acer.com themselves. All of them are on different IP networks. Incoming mail for acer.com is handled by two mailservers also at acer.com. They are on the same IP network. acer.com has one IP number. ns1.acer.com is hosted on a server in Italy.