how many numbers in ssn
Answer   Social Security Numbers (SSNs) are nine-digits in length. The maximum number of combinations without exclusion is 109, or one billion.   However, a number of â¦number combinations are excluded (e.g., 666-xx-xxxx, 000-xx-xxxx, xxx-00-xxxx, xxx-xx-0000, as well as SSNs beginning with most numbers over 733).