Incoming mail for med.ubc.ca is handled by one mailserver at ubc.ca. ubc.ca, ubc.edu, bccrc.ca, it.ubc.ca, ams.ubc.ca and at least 100 other hosts share mailservers with this domain. vhhsc2.med.ubc.ca and fomsrv018.med.ubc.ca are subdomains to this hostname. ubc.ca is delegated to four nameservers, however one delegated nameserver is missing in the zone. All of them are on different IP networks. Incoming mail for ubc.ca is handled by one mailserver also at ubc.ca. ubc.ca has one IP number.