dns1.telenor.se has one IP number , which also has a corresponding reverse pointer. sew.se, gda.se, g-d.se, sek.se, lidl.se and at least 100 other hosts use this as a nameserver. telenor.se is a domain controlled by three nameservers. Two of them are on the same IP network. Incoming mail for telenor.se is handled by one mailserver at telenor.se themselves. telenor.se has one IP number. dns1.telenor.se is hosted on a server in Sweden.