ITIN Number Lookup 2026: 3 Ways to Find Your ITIN Number

How Do You Find Your ITIN on the CP565 Notice?

The CP565 notice is the fastest way to find your ITIN. This is the official IRS letter confirming your ITIN assignment, mailed 7 to 11 weeks after the IRS processes your Form W-7.

Your 9-digit ITIN (format: 9XX-XX-XXXX) appears prominently on the CP565 letter. Look for it in the upper portion of the letter, near your name and address. The number always starts with 9 and has the middle digits in the ranges 50-65, 70-88, 90-92, or 94-99.

For details about the CP565 notice, see our CP565 notice guide.

How Do You Get Your ITIN by Calling the IRS?

Call the IRS at 1-800-829-1040 (US) or 267-941-1000 (international) to look up your ITIN. The phone line is available Monday through Friday, 7 AM to 7 PM local time.

Step-by-Step Phone Process

1. Call 1-800-829-1040. Navigate the automated menu. Select the option for “individual tax questions” or “ITIN inquiries.”
2. Wait for an agent. Hold times range from 15 to 45 minutes depending on the season. Peak season (January through April) has the longest waits.
3. Verify your identity. The agent asks for your full legal name, date of birth, mailing address, and possibly details from a prior tax return.
4. Request your ITIN. After verifying your identity, the agent provides your ITIN verbally. Write it down immediately.
5. Request a replacement CP565 (optional). If you need an official document, ask the agent to mail a replacement CP565 to your address on file. Allow 30 to 60 days for delivery.

Information You Need Before Calling

• Full legal name (as submitted on Form W-7)
• Date of birth
• Current mailing address and/or address from your last tax return
• Tax year of your most recent filing
• Filing status from your most recent return

Can You Look Up Your ITIN at an IRS Office?

Yes. Visit any of the 380+ IRS Taxpayer Assistance Centers (TACs) across the US. Bring a valid photo ID (passport, driver's license, or national ID). The TAC agent looks up your ITIN in the IRS system and provides it to you on-site.

How to Find a TAC Office

1. Visit irs.gov/help/contact-the-irs
2. Enter your ZIP code to find the nearest TAC
3. Schedule an appointment (recommended but not required)
4. Bring valid photo ID and any prior ITIN correspondence

TAC Office Hours

Most TAC offices are open Monday through Friday, 8:30 AM to 4:30 PM local time. Some locations have extended hours during tax season (January through April). Walk-ins are accepted but appointments ensure faster service.

This method is only available if you are in the US. For international ITIN holders, the phone method is the primary option.

What Other Documents Show Your ITIN Number?

Your ITIN appears on 6 types of documents you may already have:

1. Prior tax returns. Your ITIN is in the SSN field at the top of Form 1040-NR or Form 1040. Check copies from your tax preparer or your own files.
2. Form 1042-S. If a US payer reported income to you, your ITIN is in Box 13 (Recipient's US TIN).
3. Form W-2. If you received US wages, your ITIN appears in Box a (Employee's SSN).
4. Bank account records. If you opened a US bank account with your ITIN, the bank has it on file. Check your account settings, tax documents section, or call customer service.
5. IRS correspondence. Any letter from the IRS about your account includes your ITIN. Check for refund notices, adjustment letters, or renewal reminders.
6. Form W-8BEN on file. If you submitted a W-8BEN to a bank or brokerage, your ITIN is on Line 5. Contact the institution for a copy.

What If You Cannot Find Your ITIN Number?

If none of the above methods work, consider these scenarios:

• Your application was never approved. Not all W-7 applications are approved. The IRS rejects approximately 20% of applications. If you never received a CP565 or rejection letter, call the IRS to check your application status.
• Your ITIN expired and was deactivated. Expired ITINs still exist in IRS records. Call 1-800-829-1040 to confirm your ITIN and begin the renewal process.
• You need a new ITIN. If you never applied for an ITIN before, you need to apply using Form W-7. Our CAA service handles the entire application process.

How Do You Verify an ITIN Number Is Correct?

A valid ITIN follows a specific format. Use these 3 checks to verify your number:

1. Starts with 9. Every ITIN begins with the digit 9.
2. Middle digits in valid range. The 4th and 5th digits must be in ranges: 50-65, 70-88, 90-92, or 94-99.
3. 9 total digits. Format: 9XX-XX-XXXX (same length as an SSN).

For a complete guide to ITIN number format, see our ITIN number format guide.