the other set of changes affected mobile, non-geographic and premium rate numbers, completing a series of steps first detailed almost a decade earlier. in the early-1990s, mobile, non-geographic and premium rate services had used nine digit numbers with various codes such as 0402, 0645, and 0898 scattered among the similar-looking geographic area codes such as 0384, 0562 and 0949. the number of available codes for new services was quickly dwindling. in 1995, phoneday partially addressed this by altering all geographic area codes to begin 01, freeing up hundreds of codes beginning 02 to 09 for other uses. existing mobile, non-geographic and premium rate services continued as before, using various codes from 02 to 09 and with nine-digit numbers.