How to Add Extension to Phone Number

How will your company handle a workforce of thousands? Phone extension numbers are here to help you streamline your business interactions, save money, and, most importantly, provide an amazing customer experience. But how can this be accomplished? Through this article, we shall uncover and understand every minute detail about phone number extension and, more importantly, learn how to add an extension to a phone number. You will also learn how to add an extension to your phone number contacts either with an iPhone, or Android or when calling anyone. 

What is a Phone Number Extension?

A phone number extension is a combination of three to five digits that you can manually allocate to any of your team members, a team, a division, or your entire department. The main line is divided into extensions.

Confused? Don’t worry; we’ll go through this with examples later.

For example, your organization has the phone number 987 654321. You now opt to allocate extensions 200 to sales and 300 to customer support.

With this, two scenarios emerge: internal callers and external callers, respectively. Internal callers (departments or personnel within the organization) can simply dial 200 to reach sales and 300 to reach marketing.

External callers (customers and parties outside the organization) should dial 987654321,200 to reach the sales department directly, and 987654321,300 to access customer assistance.

Format of phone number extension: real phone number, dedicated extension

Example phone number extensions: +1 1424622, 231

Here, +1 1424622 is a company’s actual phone number, a comma indicates the start of an extension, and 231 is the dedicated extension.

A phone number extension allows callers to reach the desired persons or departments quickly and easily without having to deal with auto attendants. Employees and teams inside the firm can communicate with one another by dialing extensions. That is why it is also known as extension dialing.

How are Calls Routed to an Extension Number?

Call routing to an extension is determined by and varies by service provider. However, they all share the same core call routing design, which may be summarized in three points. These three points will be discussed in this section to help you understand how calls are routed to an extension.

Step #1: A caller dials

When callers dial a phone number with an extension number saved on their cell phone, extensions are immediately dialed. It is possible that the call will circumvent an IVR or an auto attendant.

However, if a caller dials the phone number without an extension recorded in their contacts app, the call cannot be bypassed.

In both circumstances, the caller has merely reached the main line, which is where the routing mechanisms (a specific set of coding or hardware) kick in.

Step #2: Call router in action

The automated system (software) sends calls to their designated destinations based on the extension selected or dialed by the caller. If there are several callers on the line, it queues them and informs them of their position on the line.

The router is where service providers differ from one another. The core approach, though, remains the same: identify extensions and route calls to specific extensions.

The line or call is connected to the target line or extension after the queue is cleared.

Step #3: Caller gets connected to the target extension

The final stage is for the caller to reach his or her intended destination, which could be an employee, customer service, sales department, or something else.

The routing of extension calls is based on a set of codes and a small piece of hardware that recognizes and establishes connections based on dial extensions.

Benefits of Using Phone Number Extensions

Phone number extensions provide an infinite number of benefits, particularly when used in conjunction with VoIP services. From optimizing business communications to saving you money on communications in the long run.

The following are some notable advantages of employing phone number extensions:

  • Saving money: Because a single main line may support several extensions, you save money by not paying for individual numbers.
  • Streamline calling: Allows employees to interact with one another by dialing specific extensions rather than remembering the entire phone number.
  • Enable employee mobility: Extensions, like VoIP services, allow your staff to be productive while on the go.
  • Customer-first experience: Inform your clients about the extensions for all of your company departments so they can avoid the auto-attendants, resulting in a better customer experience.
  • Focus on hybrid work culture: Extensions allow your organization to employ personnel on both on-site and remote stations, with synchronized communications on both ends to keep everyone on the same page.
  • Concentrate on productivity and efficiency: By delegating tough and boring activities to IVRs, your staff may focus on more vital aspects of their jobs.
  • Easy-to-remember vanity numbers: When using virtual numbers, you can experiment with creating eye-catching vanity numbers and inserting comparable extensions at the end to ensure that your audience remembers them forever. A one-of-a-kind marketing strategy.
  • Exceptional customer communication: Extensions allow your customers to reach their desired destinations quickly and conveniently via extensions or IVR or auto-attendants.
  • A clear picture of each individual’s performance: Through their specific extensions, you can simply track, document, and analyze your employees’ development and effectiveness.

How to Add an Extension to a Phone Number?

Depending on the caller or customer and the firm, adding an extension to a phone line might indicate two distinct things.

According to the corporation, adding an extension to a phone number entails essentially assigning 3 to 5-digit numbers behind the original number to segment the main line.

This can be done through the administrator panel. One thing to keep in mind is that different service providers have different admin settings and panels, so you may need assistance from customer care at first.

However, in this section, we will look at how to add an extension to a phone number from the customer’s perspective. To add an extension to a phone number on Android, iPhone, or iOS, follow a similar, but not identical, procedure.

So let us look at them independently in the sections that follow:

How to Add an Extension to a Phone Number on iPhone Contacts?

You can add an extension to a phone number on iPhone contacts while creating a new contact or editing the existing contact. It allows you to dial extensions automatically the next time you call that number.

To add an extension to a phone number in your iPhone contacts, follow these instructions.

(When creating or modifying a contact on iPhone, the most important thing to remember is the phone number.)

To add an extension to a phone number in your iPhone contacts, follow these steps:

  • Open the contacts app on your iPhone and select the contact you want to add an extension to,
  • Tap Edit and tap the contact’s phone number section,
  • Place your cursor at the end of the phone number
  • Tap the “+*#” button on the dial pad to access further options
  • Tap on the “wait” button and enter the extension
  • Tap “done” in the top-right corner.

You might simply substitute a comma (,) for the semicolon (;). A comma implies a pause rather than a wait. After you complete the aforementioned procedures, the phone number in your iPhone contacts will be +1 1424622;123. (Your contact phone number is +1 1424622.)

How to Add an Extension to a Phone Number on Android?

Adding an extension to a phone number on an Android device is comparable to adding an extension to a phone number on an iPhone. Let’s look at how to add an extension to an existing phone number in an Android contact.

On Android, follow these steps to add an extension to a phone number:

  • Open the contacts app or go to the phone app and tap on contacts, 
  • Select open the contact you want to edit,
  • Tap on the pencil icon or edit button,
  • Tap on the contact’s phone number section and place your cursor at the end of the number,
  • Enter a single comma (,) for a 2-second pause or semicolon (;) for a wait,
  • Enter an extension and tap on save. 

Important to note: If you can enter the extension as soon as the phone is answered, tap pause or a comma (,). If you need to wait a little longer for the automatic message to finish, use the wait method, followed by a semicolon (;).

To contact the next staff or department, simply dial the extension number. For example, if Ken has a 123 extension and you want to reach him from within the workplace, dial 123, hit the green phone button, and his cell phone will ring.

Can You Dial Extension Directly?

If you have an Android phone, you might be wondering if you can call an extension directly from your phone number. It is conceivable! Installing the Android Dial Phone app allows you to quickly dial an extension by pressing a button. You can simply skip this step if you’re familiar with extension dialing. It saves time and energy, as well as money on long-distance calls.

To dial an extension straight from an Android phone number, add a comma or semicolon after the main phone number. Enter the extension number after the comma. You can also add the extension number to your address book. Once you’ve saved the extension number on your phone, you can utilize the pause or wait ways to go to it. You can even add several commas to the number to postpone it even more.

Business Vs. Residential Phone Number Extension

Most individuals have a hazy grasp of extension numbers and tend to apply them just to business and residential phone numbers. However, you should be aware that these two are distinct in nature.

Let us investigate them in the next parts to see how they differ. A residential phone number extension may or may not contain a sub-division of the primary line. Because the main line is linked to numerous phone systems (indicating answering machines), when an inbound call comes in, all of the connected phones ring at the same time. You may respond to the call from any of those endpoints.

How Do I Automatically Add an Extension to My Phone Number?

The wait method can be used:

  • Open the Contacts app on your Android phone and tap the contact whose extension you’d like to add.
  • Tap the Pencil icon.
  • Select the phone number field, then place the cursor at the end of the phone number.
  • Use the Android keyboard to insert a single semicolon to the right of the phone number.

Can You Add an Extension to a Phone Number in iPhone?

In iPhone, you can add an extension to a phone number. Tap Edit and then the phone number part of the contact. Place your cursor at the end of the phone number. To access further choices, press the “+*#” button on the dial pad. Enter the extension by tapping the “wait” button.

Can I Text a Number With an Extension?

With corporate text messaging software, you may SMS a phone number extension. Business text messaging allows you to text-enable a business line while keeping your current phone number and phone number extensions.

How Do I Change the Extension on My iPhone?

Go to Safari > Settings > Extensions. Tap More Extensions to browse the App Store for extensions.

Where Are Extension Settings?

To manage the Chrome Extensions settings, follow these steps: Open Google Chrome. Open Customize and Control (three-dot symbol in the upper right corner). Select “Extensions” from the “More Tools” menu.

How Do I Change Extension Type?

You can change the extension type by:

  • Open Windows File Explorer and select a file to change
  • Replace the old file extension with a new one to change your file
  • Push the “Enter” button on your keyboard to save your changes.

How Do I Get an Extension on Apple?

Choose Safari > Safari Extensions in the Safari app on your Mac, then browse the available extensions. When you discover one you like, click the Get or Price button, then click the button again to install or buy the extension.


An extension is the separation of a primary phone number into many sub-sections or numbers to allow different endpoints to interact with one another. Sharing a phone number with several team members or departments is a basic notion.


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