some DNS config q's

[Chadi]

hI all !   i have successfully configured my DNS in a way that nslookup ftp.mydomain.com or ww.mydomain.com will point to me, for example, 111.22.33.44 ... i am master to this domain and doing a  $ whois mydomain.com will give myself (111.22.33.44) as primary DNS and some free DNS service as 2ndary.   my question is, how do i configure DNS so that doing  $ nslookup mydomain.com alone, (that is, w/o those prefixes i added like www, ftp, mail, etc) will immediately point to my address ?     and another thing,   about the lines in /etc/named.conf w/c says,       options {               directory "/var/named";               allow-transfer "111.22.33.44";        };     what if i want to allow 5 or 10 diff addressess to do zone-tranfers on my data, how exactly do that ?   thanks a lot and hope someone can help, Chadi