AI phone numbers for business: what they are and how to get one

Looking for a number to call or text an AI like ChatGPT? OpenAI's is 1-800-242-8478 (1-800-CHATGPT). This guide covers AI phone numbers for businesses: numbers that answer your calls, take messages, and book appointments around the clock.

What is an AI phone number?

An AI phone number is a normal telephone number connected to an AI system trained on your business. When someone calls, the AI answers, talks with the caller, and takes messages, answers questions, books appointments, or transfers the call.

Businesses use AI phone numbers as an alternative to voicemail or to a traditional human answering service.

With a self-serve service, the number comes with the AI. In Upfirst, you choose a country and area code when you create your agent, then pick from the available numbers.

What does an AI phone number handle?

Upfirst is an AI receptionist for small businesses. In our analysis of 626,000 calls answered by Upfirst:

• 22.9% came in after hours, on evenings and weekends, when most small businesses send calls to voicemail.
• 14.3% involved a language other than English. An AI phone number can answer in the caller's language.
• The median call lasted 63 seconds. Most callers want one thing: a quote, an appointment, hours, or a callback.

The phone still matters. In our survey of 255 consumers, 47% said they prefer to contact businesses by phone.

Freed's Bakery in Las Vegas is a good example. The team used to pick up calls at 2 AM without knowing if it was an emergency or someone asking about hours. Now an AI answers those calls. As Max Jacobson-Fried put it, "It's really nice not to get phone calls all hours of the night." Read how Freed's Bakery automated after-hours phone calls.

How much does an AI phone number cost?

What you pay depends on the provider you pick. Some AI answering services, like Upfirst, include a phone number as part of the plan. Others split it into two costs: the phone number itself, and the AI that answers it.

The phone number. If your provider includes a number, there's nothing extra to buy. Developer platforms usually don't include one. There, you rent a number from a carrier like Twilio or Telnyx, then connect it to your AI agent.

Number prices vary by country and by number type, so check the carrier's pricing page for where your customers are. In the US, Twilio charges $1.15 a month for a local number and $2.15 for a toll-free number, and Telnyx local numbers start at $1 a month, or less if you're on an enterprise plan with them. Some countries also require proof of a local address before you can get a number.

Here's what buying a number looks like on Telnyx. You search by country and area code, add a number to your cart, and then connect it to your AI agent yourself.

The AI answering. Providers charge in one of two ways:

• Per call. You pay a flat fee for each call, however long it runs. Upfirst costs $24.95 a month for 30 calls, then $1.50 per extra call.
• Per minute. You pay for talk time. Developer platforms charge $0.05 to $0.31 a minute. Self-serve plans bundle minutes, like My AI Front Desk at $99 a month for 200 minutes.

A few providers count other units. XBert counts conversations across calls, texts, and chats, and Goodcall counts unique callers each month.

Put together, most small businesses pay $25 to $100 a month for an AI phone number with the number included. For comparison, a live answering service costs $79 to $250 a month for 50 minutes of calls, and an in-house receptionist earns a median $38,010 a year. Our guide to virtual receptionist pricing breaks down both.

AI phone number providers compared (2026)

AI phone numbers come in two kinds. Self-serve products give you a working AI receptionist in minutes. Developer platforms give you the parts to build your own voice agent. Prices below come from each provider's own pricing page in September 2026.

Which kind fits depends on who will set it up. If you can build and host your own agent, Retell, Bland, Telnyx, and Twilio give you full control over the call logic. If you want a brand-new business line with an app for calls and texts, Beside, Allo, and XBert are phone systems with an AI receptionist built in. Upfirst works with the phone number you already have: you forward calls to it and keep your existing line.

How do I get an AI phone number?

Start by deciding which approach fits you. A developer-first platform gives you full control, but you rent the number and build the agent yourself. A self-serve service gives you the number and a working AI receptionist, ready to set up in about 10 minutes. Either way, look for a provider that includes the phone number, so you're not buying and connecting one separately.

1. Pick your approach and provider

If nobody on your team writes code, pick a self-serve provider from the table above. If you have developers and want to control every step of the call, a platform like Retell, Bland, or Telnyx fits.

2. Choose your number

You have three options.

• A local number uses an area code from your city. A Denver plumber would pick a 303 or 720 number.
• A toll-free number (800, 888, 877) suits businesses that serve customers in several states. Vanity numbers like 1-800-FLOWERS are a type of toll-free number.
• Your existing number. Keep it and forward calls to the AI number. Your customers never see a change.

3. Train your AI

This is where you decide what happens when someone actually calls the number: what the AI says, which questions it asks, and when it hands the call to you. Most self-serve providers let you write these instructions in plain English. For examples, see our guide to AI virtual receptionist script customization.

In Upfirst, you write these instructions as training, in plain English. This example tells the AI which details to collect from callers and what to ask if they're running late.

• Write a short greeting: "Hi, thanks for calling [Business Name]. How can I help?"
• Add the questions callers ask most: pricing, hours, service area, how to book.
• Decide what happens on each type of call. A new lead leaves their details. An emergency goes to your cell.
• Connect your calendar for appointment setting, and your CRM or Zapier for lead capture.

4. Forward your calls

Set up call forwarding from your business line to the AI number. You can forward every call, or only when you're busy or after hours. Most carriers support this with a quick settings change. Our call forwarding answering service guide covers the details.

5. Test it

Call your AI number from your personal phone. Try a few scenarios, then adjust the answers based on what you hear.

Can I keep my existing phone number?

Yes. Forward your current number to the AI phone number, and callers dial the same number they always have. Most providers also support porting, which moves your number to the provider entirely. Here's how to port your business phone number to an AI answering service.

AI phone numbers vs. traditional phone systems

When should a call go to a person?

AI phone numbers handle routine calls well: questions, messages, bookings, and lead intake. Route these to a person instead:

• Emotional or sensitive conversations, like an upset client or a medical concern.
• Calls that need a judgment call only you can make, like approving a discount.
• Anything your callers expect a named person for, like VIP clients.

Set transfer rules for these, and review call transcripts during your first week to fine-tune the answers.

FAQs about AI phone numbers

Can an AI phone number handle multiple calls at once?

Yes. An AI phone number answers several calls at the same time, so nobody waits on hold or goes to voicemail.

What if the AI can't answer a question?

It takes a message or transfers the call to you or a teammate. You set the rules, like always transferring emergencies or calls from VIP clients.

Do callers mind talking to an AI?

Most don't, especially when you're upfront about it. In our analysis of 450,702 calls to Upfirst AI receptionists, greetings that said the caller was speaking with an AI were associated with about 20% fewer hang-ups.

How do I try one?

Upfirst has a 14-day free trial with no credit card required. Plans start at $24.95 a month, and you can compare them on the Upfirst pricing page.