- The first Regular Expression Library on the Web!

Please support RegExLib Sponsors


Regular Expression Details

Title Test Find Employer ID Number
US IRS Employee ID Number, aka Federal Tax ID Number
01-1234567, 011234567
00-1234567, 49-1234567, 123-45-6789
Author Rating: The rating for this expression. Brad Williams
Your Rating
Bad Good

Enter New Comment

Spammers suck - we apologize. Please enter the text shown below to enable your comment (not case sensitive - try as many times as you need to if the first ones are too hard):

Existing User Comments

Title: Fixed
Name: Homesar
Date: 1/10/2014 12:26:36 PM
^(0[1-6]|1[0-6]|2[0-7]|[35][0-9]|[468][0-8]|9[0-5|8-9]|7[1-7])-?\d{7}$ This covers all of the campus codes. Both the original and molaro's had a few errors, like allowing 07-1234567

Title: Re: A Few Questions
Name: molaro
Date: 8/18/2011 10:58:36 AM
I sorted the campus codes from the EIN page on the US gov's site (see below), and based on that, it seems like this RegEx should be this instead: ^([01][0-6]|2[0-7]|[35][0-9]|[468][0-8]|7[1-7]|9[0-9])-?\d{7}$ Am I just missing something? Sorted Campus Codes (sources: AND : 01,02,03,04,05,06,10,11,12,13,14,15,16,20,21,22,23,24,25,26,27,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,71,72,73,74,75,76,77,80,81,82,83,84,85,86,87,88,90,91,92,93,94,95,98,99

Title: A Few Questions
Name: molaro
Date: 8/17/2011 4:43:08 PM
Thx for posting this regex pattern. After looking through it and comparing the first section to the list of possible campus codes, I have 2 questions. 1 - seems that "[07][1-7]" is incorrect for zero. I only see 01-06 in the list. & does go from 70-77 so it is good. Am I misunderstanding something? 2 - Not sure I understand the 9 section at all. I see codes for 90-99, but your script has 90-589. Where is the 589 coming from? Thx in advance!

Copyright © 2001-2018, | ASP.NET Tutorials