Good news, that worked in the RegexBuddy editor.  I will try it out in the vendor tool and let you know if it worked there as well.  Thanks again for your help!

Thanks for your reply.  Right now I am testing out my regex using RegexBuddy.  The regex actually runs in a third party tool that scans emails.  Is that enough detail to go on?  I know the tool supports lookaheads, but I am not sure about lookbehinds.  If a possible solution is to use lookbehinds, I can ask the vendor if ...

I have been using a regular expression to search for SSN's in emails with pretty good success.  The only issue is that this expression can not exclude SS "like" numbers in URL strings. Here is the regex I am using: \b(?!000)(?!588)(?!666)(?!69[1-9])(?!73[4-9]|7[4-5]\d|76[0123])([0-6]\d{2}|7([0-6]\d|7[012]))([ ...

I'm trying to write a perl compatible regular expression that meets the following criteria for a social security number: - matches NNN-NN-NNN - no number group can start with 000, such as 000-NN-NNN, NNN-00-NNNN, NNN-NN-0000 - the area group isn't higher than 772 My pcre ...