C = Character. When seen in a domain name listing, the number of C’s refers to the number of characters in a domain name. In the domain name industry, the term Character refers to either a Letter of the
English alphabet (A-Z) or a Number (0-9). A domain with many characters may have both many letters and many numbers.
L = Letter. When seen is a domain name listing, the number of L’s refers to the number of letters in a domain name.
N = Number. When seen in a domain name listing, the number of N’s refers to the number of numbers in a domain name.