heilbron.plig.com has one IP number , which also has a corresponding reverse pointer. ns1.plig.net and mail.plig.com point to the same IP. plig.com is a domain controlled by three nameservers at plig.net. Two of them are on the same IP network. Incoming mail for plig.com is handled by one mailserver also at plig.net. heilbron.plig.com is hosted on a server in United Kingdom.