What Is Host SMS and When Should You Use It with an Existing Number?

Understand how Host SMS lets a business use an existing phone number for texting

Written By Maruf Ansari

Last updated 9 days ago

Turn on text messaging for a business number you already own, without moving your calls to a new provider. The Host SMS tab is where you add those numbers, track their progress, and see which numbers are ready to send and receive SMS.

Open it from the Business Portal sidebar under Telephony → Host SMS.

Add-on required: Your Business must activate the SMS on Existing Business Number add-on before you can access Host SMS. See Add-Ons.

What this does

Hosted SMS (also called hosted messaging) keeps your voice service with your current carrier, such as Verizon, while text messages for that number are handled by the platform. Your AI agent can then send and receive SMS on the number your callers already know.

Your voice calls are not affected. Only the messaging side of the number is moved.

Important notes

Host SMS is available only to Businesses in the United States and Canada.
In the USA, a hosted number must also be linked to an approved A2P campaign before it can send business SMS. See A2P Campaign.
You can edit a request only before you submit it.

Find the SMS on Existing Business Number card

Open Telephony, select an existing number and scroll to Add-Ons. SMS on Existing Business Number appears only if the selected number is eligible for hosted messaging. If it is not eligible, the card is not shown. You do not add another number from this card.

Before activation, the card shows Not Activated, the price and Activate. After activation, it shows Activated and the hosted-number record with its provider, campaign, added date, status and actions. Ownership verification, business details, the LOA and provider follow-up are still required.

Progress panel

Click the eye icon on a row to open the Host SMS on Existing Number panel. It shows each step — Order Received, Processing, and the final result — with a green tick for finished steps, or a red cross for Failed. While the order is in progress, a note reminds you to watch your inbox, including spam or junk, for an email from your provider.

Before you start

A US or Canada number. Hosted messaging is supported only for US and Canada landline or VoIP numbers.
Proof that you own the number. You must answer a verification call on the number and enter the 6-digit code it gives you.
A signed Letter of Authorization (LOA). The person signing must have authority over the number. The address on the LOA must be in the US or Canada.
A monitored email inbox. Your current provider may email you to confirm the request. The signing email inbox must be checked.
The SMS add-on. SMS on an existing number is offered as an add-on for Businesses in the US and Canada. See Add-Ons.

Note: In the USA, a hosted number also needs to be linked to an approved A2P campaign before it can send business SMS. See A2P Campaign.

How the process works

Select an eligible existing number in Telephony and activate SMS on Existing Business Number.

Verify ownership of the selected number with a call OTP. (In case, you have purchased the number from Kickcall, you don’t need to verify the numbers.)

Enter your business details and sign the LOA, then submit.

Confirm the email from your current provider, if you receive one.

Wait for the order to move through Order Received and Processing to Complete.

For step-by-step instructions, see Host SMS Setup.

Configuration Reference

Column	What It Shows
Number	The phone number being hosted.
Provider	The number's current provider, such as Bandwidth, RingCentral, or Twilio.
Campaign	The A2P campaign the number is linked to. A dash (-) means no campaign is linked yet. A campaign can only be linked after the no. is hosted successfully.
Added On	Date and time the number was added.
Status	Where the number is in the hosting process. See the table below.
Actions	View progress (eye icon), edit (pencil icon), or delete the number. Editing is available only before the order is submitted.

Statuses

Status	What It Means
Draft	The number was added, but setup isn't finished yet, ownership has not been verified.
Number Verified	Ownership is confirmed, but business details and the LOA have not been submitted yet. You can still edit it.
Order Received	The request was received and is waiting to start processing.
Processing	The number is being processed.
Failed	The order did not complete and the number was not enabled for hosted messaging.
Complete	Hosted messaging is enabled on the number.

Next step

Follow Host SMS Setup to verify ownership and complete the request for your selected number

Troubleshooting

Problem or Symptom	Likely Cause	Solution
SMS on Existing Business Number card is missing	The selected number is not eligible for hosted messaging, or is outside the supported countries.	Select an eligible existing US or Canada landline/VoIP number in Telephony. If you need help confirming eligibility, contact your Agency.
Stuck on Draft	Ownership verification wasn't finished.	Click the pencil icon and complete the verification call.
Stuck on Number Verified	Business details and LOA weren't submitted.	Click the pencil icon and finish step 2.
Stuck on Order Received or Processing	The provider's email hasn't been answered.	Check your inbox, including spam or junk, and confirm the request.
Status is Failed	The order did not complete.	Check your LOA details and contact your Agency.
Campaign shows a dash (-)	No A2P campaign is linked.	Link it from the A2P 10DLC Registration card.

Frequently Asked Questions

Will hosting SMS change my voice provider?

No. Your calls stay with your current provider. Only text messaging for the number is hosted.

Which numbers can I host?

US and Canada landline or VoIP numbers that you own.

What should I do if a number shows Failed?

The order did not complete and the number was not enabled for hosted messaging. Check your LOA details and contact your Agency to find out what to fix.

Can I edit a number after submitting it?

No. Editing is only available while the number is in Number Verified status, before you submit business details and the LOA.

Do I still need an A2P campaign?

Yes, in the USA. Link the hosted number to an approved A2P campaign so carriers deliver your messages.

Was this helpful?

Still need help? Ask the team