The visa number is printed in red ink in the lower right corner of your US visa stamp (also called the visa foil), the sticker a consular officer places in your passport when your visa is issued. It's typically 8 digits, though older visas sometimes show a single letter followed by numbers.

On most current US visas, the visa number has a few consistent features:

If you're comparing numbers on the page, the visa number is not your passport number (printed on your passport's own biographic page, issued by your home country) and not the visa's control number, even though both sit close by on the same document. According to USCIS, immigrant visa stamps also carry your Registration Number (A-Number) and IV Case Number in labeled fields — which is exactly why it's easy to grab the wrong one on a small, crowded document.

Not every immigration form asks for the visa number, and some forms that sound similar are asking for something else. If a field specifically says "visa number" or "visa foil number," use the red number exactly as printed. Entering your control number, passport number, or A-Number instead can trigger delays or a Request for Evidence while the agency sorts out the mismatch.

These identifiers sit close together on the same documents, which is exactly why people mix them up. Here's how they compare:

Your A-Number is worth calling out specifically, since it's the one most often confused with the visa number. Unlike the visa number, which changes with every new visa you're issued, your A-Number is assigned once and stays with you across your entire immigration history — the same way your green card number identifies a specific card while your A-Number identifies you.

This is the meaning of "visa number" that trips people up, because it isn't printed anywhere — it's a status, not a digit string.

Everyone else in a capped category has to wait their turn. When a qualifying relative or employer files a petition, that filing date becomes your "priority date" — your place in line. Each month, the State Department publishes the Visa Bulletin, listing cut-off dates by preference category and country. If your priority date falls before the relevant cut-off, a visa number is generally available to you.

A current priority date and an approved petition don't guarantee you can adjust status inside the US — how you entered the country and whether any inadmissibility ground applies still control that. You can move forward with an interview abroad, or, if you were lawfully admitted or paroled into the US and are otherwise admissible, filing to adjust status.

USCIS is direct about this: "A visa must be available before you can take one of the final steps in the process of becoming a lawful permanent resident," and how long that takes "depends on your priority date, preference category, and the country to which the visa will be charged," according to USCIS's guidance on visa availability. Visa availability is only one gate — to adjust status inside the US you generally also need to have been "inspected and admitted" or "inspected and paroled" by an immigration officer, according to USCIS's adjustment of status eligibility guidance.

If you already have a pending case, you can check your immigrant visa application status to see where things stand.

Visa numbers and the rules around visa availability are set under federal immigration law, and they work identically no matter which state you live in — USCIS and the State Department issue and track these numbers centrally. Some state agencies, like a DMV processing a driver's license application, may ask you to present the physical visa or passport rather than just the number. If you're unsure what a state agency specifically requires, check with that agency directly.

In Marble's own case notes, mixed-up visa-related numbers come up most often around marriage- and family-based green card filings — and usually surface only after USCIS issues a Request for Evidence, rather than being caught beforehand.

An immigration attorney can review your documents to confirm you're using the correct identifier on each form before you file, rather than after an agency flags a mismatch. If you're not sure whether your case is waiting on visa availability or something else entirely, an attorney with Marble can also help you read your priority date against the current Visa Bulletin and explain what happens next.

Most of the confusion around "visa number" comes down to two things: several similar-looking numbers crowded onto one small document, and a completely separate technical meaning that isn't printed anywhere at all. Once you know the red number is the one your forms usually want — and that "immigrant visa number" is really about whether your category is current — the rest of the paperwork gets a lot less intimidating.

Disclaimer: This article is for general informational purposes only and does not constitute legal advice. Immigration law is federal and subject to change. For guidance specific to your situation, speak with a licensed immigration attorney.