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Below are the valid ranges for a Social Security Number (SSN), Individual Taxpayer Identification Number (ITIN), or Adoption Taxpayer Identification Number (ATIN):

Social Security/Taxpayer Identification Numbers are broken down as follows:

1 2 3 - 4 5 - 6 7 8 9

Area - Group - Serial
 
Valid Ranges for Social Security Number (SSN):
001-01-0001 through 665-99-9999
667-01-0001 through 899-99-9999
750-01-0001 through 763-99-9999
764-01-0001 through 899-99-9999

When the SSN "Group" contains zeros, the SSN is a test SSN and the return will be rejected. When the SSN "Serial" contains all zeros, the return will be rejected.

Valid Range for Individual Taxpayer Identification Number (ITIN):
900-70-0000 through 999-88-9999
900-90-0000 through 999-92-9999
900-94-0000 through 999-99-9999

An ITIN is a nine-digit number assigned by the Internal Revenue Service to taxpayers who are not eligible to obtain an SSN. It is used for tax purposes only.  See the IRS website General ITIN Information for additional details. 

2017 Note: ITINs that have not been used on a tax return for Tax Year 2014, Tax Year 2015 or Tax Year 2016 will expire December 31, 2017.  All ITINs issued before 2013 with middle digits of 70, 71, 72 or 80 (Example: (9XX-70-XXXX) will also expire on December 31, 2017.

Valid Range for Adoption Taxpayer Identification Number (ATIN):
900-93-0000 through 999-93-9999
 
An ATIN is issued by the Internal Revenue Service as a temporary taxpayer identification number for the child in a domestic adoption where the adopting taxpayers do not have and/or are unable to obtain the child's Social Security Number(SSN). It is to be used by the adopting taxpayers on their Federal Income Tax return to identify the child while final domestic adoption is pending.

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