A2P 10DLC registration for a small business, step by step
The brand and campaign forms, the opt-in wording and the pages reviewers check.
Customers text the number on your van, your website and your Google profile, whether or not it can take texts. This guide covers the three ways to make that number text: text-enable it, move it, or add a second number, and where the replies end up.
Updated 29 October 2026, about 9 minutes to read
The short answer
You can usually keep the number and add texting. A texting provider can text-enable your landline or VoIP number while calls stay with your phone company: you sign a letter of authorisation, the provider switches texting on and the number is registered with the US carriers. The other routes are moving the number to a phone system that texts, or adding a mobile number. Google Voice forbids automatic texts, so it cannot do missed-call text-back.
Text your business number from your own mobile and wait. If nothing comes back and the text shows up nowhere, it went nowhere. Most landlines, and many office phone lines, cannot take texts until someone sets them up, and the customer who texted may never know their message was lost.
Then ask your phone company two questions: is texting already switched on for this number, and with whom? A number can be text-enabled with only one texting provider at a time. If a tool you tried years ago still holds it, a new provider cannot use the number until the old one lets go.
Customers text whatever number they find: the one on the van, the website and your Google Business Profile. Making that number take texts is nearly always better than asking people to use a new one.
For most small businesses the first is the right start: nothing changes for calls, and the number on the van keeps working. Move the number when you are replacing your phone system anyway. Add a second number only when the first two are blocked.
Text-enabling, sometimes called hosted texting, sends only the texts for your number to a texting provider. Calls, voicemail and call forwarding stay with your phone company, untouched. The steps:
What can stop it: the number is already text-enabled somewhere else, the name on the form does not match the phone account, or the number is a mobile, which cannot be text-enabled this way. Toll-free numbers can be text-enabled too, with their own verification instead of the usual registration.
Ask the provider whether picture messages will work. Customers send photos of leaks, dents and broken boilers, and some setups carry plain text only.
Porting moves the whole number to a new provider. It suits a business that is changing phone systems anyway, or that wants calls, voicemail and texts in one app, where a missed call can trigger a text without any extra link between companies.
The FCC's rules on number portability let you keep your number when you switch, as long as you stay in the same area, including between landline, mobile and internet phone providers. Your old company cannot refuse to release the number because you owe it money, though you still owe the bill.
Before you ask for the move, gather:
Do not cancel your old phone service before the move is complete. Cancelling first can lose the number. The FCC's advice is to keep the old service running until the new one works, and a number on the van, the website and every directory is hard to replace.
A new mobile or local number for texts is the quickest to set up and the hardest to make work. Customers keep texting the number they know, so you have to print the new one everywhere and tell people which number does what. Your texts go out from the new number while calls still come in on the old one, and customers save one and not the other.
It makes sense in a few cases: a branch or a service with its own line, a stopgap while a number is being moved, or a switchboard you do not control, such as a clinic inside a larger building.
Never use a member of staff's own mobile as the business texting number. When they leave, the number and every conversation on it leave with them.
Google Voice can send and receive texts, but its own policy forbids sending messages automatically, through a script or in bulk. That rules out a text after every missed call, reminders from your booking tool and any connection to other software. It suits a sole trader who types every reply by hand, and little more.
Workarounds that bolt automatic replies onto Google Voice break that policy, and a suspended account puts the number on it at risk. If you want automatic texts, use a texting provider for the number or move it to a phone system built for business texting.
This choice matters more than any feature. A text nobody reads is worse than no text, because the customer thinks you have it. The usual places are:
Then name who answers in opening hours, who answers out of hours, if anyone, and who covers days off. For a small plumbing firm, the office manager reads the shared inbox on her phone, and a reply with the word "urgent" also goes to the engineer on call.
Give everyone their own login rather than one shared password, so you can see who replied and remove access when someone leaves. Then put "Call or text" next to the number on your website and your Google Business Profile, so customers know they can.
For a text after a missed call, two things must be true. The text has to come from the number the customer rang, or they will not know who it is. And the system that sends it has to learn that a call was missed.
If calls and texts sit with the same phone system, that is a setting. If calls stay with your old phone company and texts go through a provider, the link between the two is the part to check before you sign. Ask the provider exactly how it will know a call went unanswered, then test it with a real missed call.
Here is how it looks for a two-van plumbing firm. A customer rings at 2.40pm while both engineers are under a sink, and the call rings out. Straight away the customer gets: "Sorry we missed your call, this is Brightwater Plumbing. Is it urgent? Reply here and we will call you back, or book a visit: [link]". They reply "Dripping tap, not urgent, tomorrow is fine". The reply lands in the office inbox, and the office books the visit.
Callers on a landline cannot receive the text, so keep voicemail on, with a greeting that says when you call back. GGSites sets this up as missed-call text-back, with replies landing where you already read messages, and connects it to the rest of your tools as part of automation.
Once customers know the number takes texts, the same few messages arrive again and again. Save a reply for each before you switch texting on:
Set an automatic out-of-hours reply only if it says something useful, such as when the office opens and which number to ring in an emergency. Keep each saved reply short, sign it with a first name, and write it in the same voice as your website.
There is no single price, because the bill is made of parts. Ask each provider about each of these:
In a small business the texts are usually the cheap part. The time spent answering them is not, so judge each tool by how quickly your team can reply from it on a busy day.
To the US carriers, a text-enabled landline is an ordinary local number, and business texts from it must be registered first, or they are blocked. Toll-free numbers go through toll-free verification instead. A2P 10DLC registration walks through the forms.
The registration asks how people agree to receive texts, so decide that now. A reply to a missed call, a booking reminder and an offer each need something different, as set out in text message consent rules.
Repeat the missed-call test after any change to your phone system, your opening hours or the texting tool's settings.
Whichever route you take, the number customers already know should be the one that texts them. If a call, a text or a chat window is the bigger question, chatbot, live chat or contact form compares the ways in.
Not on its own. A landline or office line takes texts only once it is text-enabled with a texting provider, or moved to a phone system that texts. Until then, texts sent to it go nowhere, and the sender may never know. Text the number from your own mobile to see what happens today.
No. Text-enabling moves only the texts for that number to the texting provider. Calls, voicemail and forwarding stay with your phone company as before. Check afterwards anyway: ring the number from a mobile and make sure it still rings where it always has.
Yes, through the texting provider's app. Texts you send show the business number, and replies come back to the app, not to your personal number. Give everyone who answers texts their own login, so you can see who replied and remove access when someone leaves.
Yes. Toll-free numbers can take texts through a texting provider too. They go through toll-free verification instead of the usual registration: a form about your business, the texts you send and how people agree to them. Unverified toll-free numbers are blocked from texting US phones.
If you text-enabled the number and move only the calls, texting can stay with the texting provider, but tell both companies first so nothing is switched off by mistake. If the whole number moves, the new provider sets texting up again and the carrier registration has to move or be redone. Ask before you sign.
It looks simpler, but it costs you later. Customers keep texting the number they know, so you print the new one everywhere and still miss texts sent to the old one. Text-enabling the existing number takes the same registration and keeps one number for calls and texts.