# How to add a business phone line and choose its number

Each line in Onyx Phone is a business phone number with its own calls, texts, voicemail, settings, and team. This guide shows account admins how to see their lines, add a new line with a local number from the area code they want, set where it's used for 911, and start moving a number they already own instead.

Works on: Web app. Updated November 6, 2026. Web page with labeled screenshots: https://www.onyxphone.io/guides/add-a-line

## Before you start

- You need to be an account admin. Your plan's number of lines is shown on the page; extra lines are added to your bill.

## Step 1. Open your lines

- Step 1.a: In the left menu, click Lines.
- Step 1.b: Read the list. Each line shows its name, its number, and how it rings.
- Step 1.c: Click Edit next to a line to change its settings.

![The Lines page listing three business lines with their numbers and Edit buttons, and the Add a line and Begin a port buttons.](https://www.onyxphone.io/guides/shots/web-lines-list.webp)

## Step 2. Add a line with a new number

- Step 2.a: On Lines, click Add a line at the top right.
- Step 2.b: In Line name, type a name your team will recognize, such as Sales or Main line.
- Step 2.c: Under How calls ring, tick what should ring for this line, Browser, Phone app, and Desk phones. If your account has more than one business, also choose the business the line belongs to.
- Step 2.d: In Area code, type the three-digit area code you want. To narrow it down, type the next three digits in Next 3, the last four in Last 4, or both.
- Step 2.e: Click Search numbers, then click the number you want from the list. Each shows its city and state.
- Step 2.f: Under the 911 address, choose The business address or A different address where this line is used.
- Step 2.g: Click Add line. The number is yours right away; set up how it rings next. See Line settings, ringing, and voicemail.

![The Add a line page with the line name, the area code search, the 911 address choice, and the Add line button.](https://www.onyxphone.io/guides/shots/web-lines-new.webp)

## Step 3. Keep a number you already have

- Step 3.a: On Lines, click Begin a port, or on Add a line click Request a port-in.
- Step 3.b: Fill in the port request. See Move a number you already have.

![The Lines page with the Begin a port and Request a port-in buttons highlighted.](https://www.onyxphone.io/guides/shots/web-lines-port.webp)

## Questions and answers

### Can I choose any area code?

You can search any US area code. If none are free in that area code, try a nearby one; a number in an overlay area code dials the same locally. See area codes by state.

### How many lines does my plan include?

The page shows your plan's included lines and how many you have. More can be added to your bill; see pricing.

### Who can answer a new line?

Admins at first. Add teammates to it on Team, or tick it when inviting someone. See Invite and manage teammates.

### Can I get a toll-free number?

Contact us for a toll-free line. Toll-free numbers have their own texting verification.

### How do I remove a line?

Contact us from the contact page and tell us which line. Removing a line releases its number, so we confirm with you first.