How to get a U.S. phone number as a non-resident founder

Forming a U.S. LLC or C-Corp from outside the country is easier than ever. You can file in Delaware or Wyoming online, get a registered agent, and have a company in a few days. Then you hit the forms. The bank application wants a U.S. phone number. So does your payment processor. So does Form SS-4, the IRS application for an EIN. Your local number sometimes works, but often it doesn't, and when it does, verification codes from U.S. services can arrive late or not at all.

This guide covers why you need a U.S. number, the options you actually have, and what to check before you choose one.

Why your U.S. company needs a U.S. number

Banking. Business bank accounts and fintech accounts use your phone number for sign-up, sign-in codes and security alerts. It's the key to your money, so it needs to work every time.

Payments. Payment platforms ask for a business phone number and use SMS for verification. Your customers may also see the number on statements or receipts.

Taxes. Form SS-4 has a field for the applicant's phone number, and the IRS may call it with questions about your application. We cover this in our EIN guide.

Customers and partners. A U.S. number on your website and invoices looks local to U.S. buyers, and it keeps your personal number off public pages.

Your options

1. A U.S. carrier SIM

The most traditional option. You get a real mobile number, but you usually need to be in the U.S. to buy it, you pay for a monthly plan you mostly don't use, and the SIM has to stay active. Roaming on it from abroad can be expensive, and some prepaid plans recycle numbers after a period of inactivity.

2. Free VoIP apps

Apps that give you a free or cheap number over the internet are easy to set up, but those numbers are listed as VoIP. Many banks and payment apps check this and refuse to send codes to them. Some free numbers are also reclaimed if you don't use them often. We explain why in Why banks reject Google Voice.

3. Business phone systems

Cloud phone systems are built for sales and support teams: call queues, IVR menus, seats. They're great at that, but they cost more per user, and most of their numbers are also VoIP, so they run into the same verification problems.

4. A mobile-registered number in your browser

This is what TwinNumber does. You get a U.S. number that carrier databases list as mobile, not VoIP, and you use it from any browser. No SIM card, no U.S. address, no plan you have to keep alive with a physical phone.

What to check before you choose

Line type. Run the number through a public line-type lookup. You want "mobile" or "wireless", not "VoIP".

Long-term ownership. Your bank will text this number for years. Make sure it isn't recycled when you don't use it for a while.

Short-code SMS. Many verification codes come from five- or six-digit short codes. Your number must be able to receive them.

Calls. The IRS and your bank may call. Check that you can answer from wherever you are, or forward calls to your own phone.

One number per company. If you run more than one business, keep them apart so codes never get mixed up.

Where to use it first

Once you have the number, add it in this order: your business bank account, your payment processor, your SS-4 if you don't have an EIN yet, then your domain registrar and email accounts. Put it on your website last, after you've set up notifications so you don't miss a customer.

We test popular services and publish the results with dates: Mercury, Stripe and Wise.

Limits worth knowing

No number works with every service; each one decides for itself. With TwinNumber, calls work with U.S. and Canadian numbers, and calling out from the browser is coming soon. Texts go to 240+ countries. Keeping an existing number isn't available yet, so you'll start with a new one.

For most non-resident founders, that's the right trade: a number that passes line-type checks, stays yours as long as your plan is active, and works from wherever you are.