How do i get a code for a magnavox?

Magnavox: 005, 007, 045, 049, 050, 054, 055, 064, 097,098, 099, 153, 154, 160, 170, 174, 177, 181, 210, 230, 234, 252, 253, 258, 259, 272, 274, 283