<div>
IRS REGEX FROM: <a href="http://regexlib.com/UserPatterns.aspx?authorid=fd2705c4-5998-4154-9d4e-a5996cdcebe1" rel="ugc">http://regexlib.com/UserPatterns.aspx?authorid=fd2705c4-5998-4154-9d4e-a5996cdcebe1</a><br />
<br />

<pre><code id="code-20-34432798-1">^([07][1-7]|1[0-6]|2[0-7]|[35][0-9]|[468][0-8]|9[0-589])-?\d{7}$</code></pre>
<br />
Adding two optional characters at end:<br />
<br />

<pre><code id="code-20-34432798-2">^([07][1-7]|1[0-6]|2[0-7]|[35][0-9]|[468][0-8]|9[0-589])-?\d{7}(-[A-Za-z]{2})$</code></pre>
</div>


IRS REGEX FROM: http://regexlib.com/UserPatterns.aspx?authorid=fd2705c4-5998-4154-9d4e-a5996cdcebe1 [http://regexlib.com/UserPatterns.aspx?authorid=fd2705c4-5998-4154-9d4e-a5996cdcebe1]



^([07][1-7]|1[0-6]|2[0-7]|[35][0-9]|[468][0-8]|9[0-589])-?\d{7}$


Adding two optional characters at end:



^([07][1-7]|1[0-6]|2[0-7]|[35][0-9]|[468][0-8]|9[0-589])-?\d{7}(-[A-Za-z]{2})$

<div>
<div class="content wysiwyg-content">
I have been trying to get a regex to validate for IRS # and also the alternative format where it has the &quot;-AA&quot; at the end for subsets of a company.<br />
<br />
Any ideas?<br />
<br />
Thx
</div>
</div>


I have been trying to get a regex to validate for IRS # and also the alternative format where it has the "-AA" at the end for subsets of a company.

Any ideas?

Thx

IRS Number

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.