How do I start dnsmasq?

I have installed dnsmasq but I can't start it:

$ dnsmasq

dnsmasq: failed to create listening socket for 10.0.1.57: Permission denied
$ sudo dnsmasq

dnsmasq: failed to create listening socket for 127.0.0.54: Address already in use

So how do I specify a socket and what address? How do I start it?