US carrier registration FAQ

You may have heard that the large US cell phone carriers require businesses to comply with a new set of policies to decrease the amount of spam texts and calls their customers receive. In addition to these FAQs, be sure to fully review our US carrier registration guide for more information on how to get registered.

Who is required to complete the US carrier registration form?

All businesses using OpenPhone to send texts to any US number must complete our US carrier registration form.

Do I need to wait until my number is ported over before registering?

No, but you must have an active account (not on a trial) to register with OpenPhone.

What if I add a number to my workspace? Do I need to register again? 

You won’t need to register again, as a submitted application covers all phone numbers in your workspace. 

What if I already registered with another provider before moving to OpenPhone?

At this time, you’ll need to re-register. 

Can I register a toll-free number for A2P 10DLC?

No, all toll-free numbers in a workspace will remain unregistered. A2P 10DLC is limited to 10-digit long code phone numbers. Toll-free numbers are not recommended for texting.

If I have a Canadian phone number, do I still need to register? 

If you are texting any US numbers, you will need to register.

What types of messages are businesses prohibited from sending in OpenPhone?

The following messaging categories and examples are not allowed on our platform:

High-risk financial services
  • Payday loans
  • Short term high-interest loans
  • Third-party loans (e.g., auto, mortgage. “Third-party” means originating from any party other than the one which will service the loan.)
  • Student loans
  • Cryptocurrency

Third-party lead generation services


  • Companies that buy, sell, or share consumer information

Debt collection or forgiveness


  • Third-party debt collection (“Third-party” means originating from any party other than the one who is owed the debt. For example, a hospital could send messages regarding bills for its own patients, assuming they provided opt-in to receive that messaging. Third-party debt collectors may send transactional messages that consumers have directly opted in to; however, they cannot use SMS as a channel to collect a debt.)
  • Debt consolidation
  • Debt reduction
  • Credit repair programs

“Get rich quick” schemes


  • Deceptive work-from-home programs
  • Risk investment opportunities
  • Pyramid schemes

This is different from outreach about employment as a result of compliant opt-in practices, messages from brokerages to their members, investment news alerts, or other investment-related messages.

Illegal substances/articles


  • Cannabis (Cannabis is federally illegal in the United States. Cannabis businesses will not be permitted to use SMS/MMS messaging in the US, regardless of message content.)
  • CBD (CBD is federally legal, but is subject to varying legal restrictions across US states, so US carriers do not permit messaging related to CBD.)
  • Fireworks (Fireworks are a regulated product and US and CA carriers do not permit messaging related to fireworks.)

Prescription drugs


  • Any sort of drugs that require a prescription (Offers for drugs that cannot be sold over-the-counter in the US/Canada are forbidden.)



  • Casino apps
  • Gambling websites

Gambling traffic is prohibited in the US and Canada on all number types (toll tree, long code).

"S.H.A.F.T." use cases


  • Sex
  • Hate
  • Alcohol
  • Firearms
  • Tobacco

While tobacco and alcohol traffic is prohibited on toll tree, it is allowed on long code, as long as proper age-gating procedures are in place. Firearms and vaping-related traffic is prohibited.

Do I have to register with the Free Caller Registry also?

SHAKEN/STIR is a protocol mandated by the FCC. If you’re following best practices and are still being marked as SPAM on your recipient’s caller ID, you should also consider registering with the Free Caller Registry (FCR). Keep in mind this registration process can take weeks to process on the FCR’s end. 


STIR/SHAKEN (also referred to as SHAKEN/STIR ) is a caller authentication framework developed by ATIS and IETF and is meant to reduce fraudulent robocalls.

With STIR/SHAKEN protocols, carriers may flag non-compliant callers on the recipient’s caller ID as:

  • Possible spam
  • Suspected robocall
  • Scam likely

What is A2P 10DLC?

A2P 10DLC refers to a system in the United States that allows businesses to send Application-to-Person (A2P) type messaging via standard 10-digit long code(10DLC) phone numbers. In an effort to combat SMS spam, US carriers consider all messages sent using virtual phone numbers with local area codes, like the ones provided by OpenPhone, to be A2P.

I use OpenPhone for non-work communication, do I still need to register?

At this time, you’re not required to register. It’s possible you may see affected text deliverability.

How do I complete A2P 10DLC registration?

Filling out the US carrier registration form helps you register for both the A2P 10DLC and STIR/SHAKEN systems advocated for by the large US cell carriers. 

How can I check whether my registration was approved?

After you’ve submitted the US carrier registration form, you can easily track the progress of your application by returning to the “Trust” settings from the web or desktop app.

Are there any volume thresholds where registration isn’t required to text?

At this time, if you use OpenPhone to send business texts, you’ll need to complete the US carrier registration form. 

Will it cost extra now to send text messages?

With these new guidelines advocated for by carriers, we unfortunately have to pass along their processing fees to you so we can continue to serve your business.

The review of your application from The Campaign Registry requires a $4 brand registration fee and a $15 manual vetting fee that we'll bill to you based on the credit card on file. These fees go directly to The Campaign Registry to review and approve your application. In addition to the one-time registration fees, OpenPhone will pass on a $1.50 per month fee from The Campaign Registry in order to maintain your good standing with the US cell carriers.

If The Campaign Registry finds an issue after reviewing your application, you'll need to pay a $15 resubmission fee.

100% of the fees mentioned above go to The Campaign Registry to help you register and stay in good standing with the US cell carriers.

Who is The Campaign Registry?

The Campaign Registry is a third-party organization that works with North American mobile operators and companies to help their customers register based on emerging A2P 10DLC guidelines. 

Can I expedite my US Carrier registration?

Not at this time, as each of these applications is manually reviewed by The Campaign Registry. The Campaign Registry currently has a backlog of requests from thousands of businesses worldwide registering. Keep in mind your registration may take weeks to process on the carriers’ end.