what is the @ in zonerecords?

Hi, I am having some trouble getting dns right at the server of an ISP. In the web-interface I see @ and * in the localname column. I suppose it is some form of wildcard, and I can understand * (all of it, I suppose) but what does @ mean? -- L. de Braal BraHa Systems NL - Terneuzen T +31 115 649333 F +31 115 649444