This article explains the valid range for Social Security Numbers (SSN), Individual Taxpayer Identification Numbers (ITIN), or Adoption Taxpayer Identification Numbers (ATIN).
- For more information, see IRS Publication 1346 (Electronic Return File Specifications and Record Layouts for Individual Income Tax Returns).
Identification Numbers are broken down as follows:
1 2 3 - 4 5 - 6 7 8 9
Area - Group - Serial
Social Security Number (SSN) Ranges
- 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.
Individual Taxpayer Identification Numbers (ITIN) Ranges
- 900-70-0000 through 999-88-9999
- 999-90-9999 through 999-92-9999
- 999-94-0000 through 999-99-9999
- The valid range for the ITIN "Area" is 900 through 999.
- The valid range for the ITIN "Group" is
- 70 through 88
- 90 through 92
- 94 through 99
- The valid range for the ITIN "Serial" is 0000 through 9999.
An ITIN is a nine-digit number assigned by the Internal Revenue Service to taxpayers who aren't eligible to obtain an SSN. It's used for tax purposes only.
Adoption Taxpayer Identification Numbers (ATIN) Ranges
- 900-93-0000 through 999-93-9999
- The valid range for the ATIN "Area" is 900 through 999.
- The valid ATIN "Group" is 93.
- The valid range for the ATIN "Serial" is 0000 through 9999
An ATIN is a temporary nine-digit number issued by the Internal Revenue Service for an adoptive child. It is provided to individuals who are in the process of legally adopting a US citizen or resident child and who aren't eligible to obtain an SSN for that child in time to file their tax return.
