When I enter: TELL LISTSERV SHOW ALIAS PTEARN LISTSERV fetches the ":internet" tag, and send me the response: * Node PTEARN is also known as PTEARN.FCL.PT. However, when I ask NSLOOKUP for the Internet address for this name, I get an authoritative "non-existent domain" error message from 'NS.DNS.PT'. Can anyone explain why? P.S. When I ask NSLOOKUP for the address for 'PTEARN.FC.UL.PT', i.e., a slight-different name, it reports '192.68.221.1'. P.P.S. Similarly, 'PTIFM.IFM.PT' and 'PTIFM.IFM.RCCN.PT' are equally-confusing!