Vanity Call Signs FAQ : What Vanity call signs may Novice operators choose?
A Novice operator may only apply for a "Group D" (2-by-3) call sign format. A Group D call sign has 2 prefix letters followed by any numeral 0 (zero) through 9 and any available three suffix letters. (for example: KA1AAA). The prefix must be from the KA to KZ or the WA to WZ prefix blocks. Important: 2-by-3 call signs beginning with AA to AL and NA to NZ are NOT available to any Amateur Radio station and may not be selected. There are some other exceptions.