Rules for validating social security numbers
Rules for validating social security numbers - Cybersex with 50plus online free chatrooms
In this java regex tutorial, we will learn to use regular expressions to test whether a user has entered a valid Social Security number in your application or website form. United States Social Security numbers are nine-digit numbers in the format AAA-GG-SSSS with following rules.
Area numbers assigned prior to 1972 are an indication of the SSA office which originally issued the SSN. The Social Security Number Verification Service (SSNVS) at two ways to verify over the Internet that names and Social Security numbers match the Social Security Administration’s records. The second and third sets of digits in this pattern simply match any two- or four-digit number, respectively, but use a preceding negative lookahead to rule out the possibility of matching all zeros. If you need a more rigorous solution that checks with the Social Security Administration to determine whether the number belongs to a living person, refer to the section of this recipe.^ # Assert position at the beginning of the string. 000|666) # Assert that neither "000" nor "666" can be matched here. Techniques used in the regular expressions in this recipe are discussed in Chapter 2. [0-6] # Match a character in the range between "0" and "6". A more thorough discussion of matching numeric ranges, including examples of matching ranges with a variable number of digits, can be found in Recipe 6.5.
The Social Security Number Verification Service (SSNVS) at two ways to verify over the Internet that names and Social Security numbers match the Social Security Administration’s records.
First, it uses the negative lookahead to rule out the specific values “000” and “666”.
The first group of digits is much more complex and harder to read than the others because it matches a numeric range.
This kind of restriction can be pulled off without lookahead, but having this tool in our arsenal dramatically simplifies the regex.
The first set allows any number from 000 to 899, but uses the preceding negative lookahead to rule out the specific values 000 and 666.
The area numbers are assigned to geographical locations.