The basic method: pause, then extension

When you call a number with an extension, dial the main number first, wait for the greeting or menu to finish, then enter the extension digits. Most phone systems expect you to press the extension after the recorded message ends or after a prompt asks you to enter it. The timing matters — if you enter digits too quickly, the system may not recognize them.

On a traditional landline or mobile phone, you dial the main number normally. When you hear the greeting or a tone, press the extension number on your keypad. If the system doesn't respond, wait a few seconds and try again. Some systems announce "press your extension" explicitly; others require you to know the extension exists.

Key Takeaways

  • Dial the main number first, then wait for the greeting or prompt before entering the extension.
  • Use the pause feature (usually a comma in your phone's contact) to automate extension entry on future calls to the same number.
  • If you hear a menu, listen for an option to reach a specific department or person before entering an extension.
  • Some systems require you to press a key like # or * after the extension to confirm it.
  • If the extension doesn't work, hang up and call back — the system may have timed out or the extension may have changed.

Using the pause feature to save time

Most phones let you add a pause to a saved contact so the extension dials automatically. On an iPhone, open the contact, tap edit, and place your cursor in the phone number field where you want the pause. Tap the + button (or * and # buttons depending on your iOS version), then select pause. A comma will appear in the number. Add your extension after the comma.

On Android, the process is similar: open the contact, edit the number, and add a comma where you want the pause. Some Android phones use a different symbol or menu option, so check your phone's help if a comma doesn't work. When you call that contact, the phone will dial the main number, pause for about two seconds, then automatically enter the extension.

If two seconds isn't long enough for the system to finish its greeting, add multiple commas. Each comma adds roughly one second of pause time. Test it once by calling and listening — if the extension dials during the greeting, add another comma and try again.

What to do if the extension doesn't work

If you enter the extension and nothing happens, the system may not have recognized it. Hang up and call back. The phone system may have timed out waiting for input, or the extension may no longer be active. When you reach the greeting again, try entering the extension more slowly, or wait longer before pressing the digits.

Some systems require you to press # or * after the extension to confirm it. If you know the company uses this method, add it to your saved contact after the extension number. For example, if the extension is 5, save it as a number followed by a comma, then 5#.

If the extension still doesn't work after two attempts, the extension may have changed or been discontinued. Call the main number and listen to the full menu — there may be a newer extension listed, or an option to reach the person or department you need by pressing a different key.

Navigating menus before entering an extension

Many businesses use automated menus that let you reach departments without knowing an extension. When you call, listen to the full menu before entering anything. The system might say "Press 1 for sales, press 2 for support, press 3 for billing." If one of these options reaches the person or department you need, use it instead of an extension.

If you know the person's extension but the menu offers a department option that covers their area, try the menu option first. It may route you faster than entering an extension, especially if that person is busy or away. If the menu doesn't have what you need, wait for a prompt to enter an extension or press 0 to reach a receptionist.

Calling from VoIP services and business phone systems

VoIP services like Skype, Google Voice, or business systems like Zoom Phone work the same way as regular phones when calling out. Dial the main number, wait for the greeting, then enter the extension using your keypad. The pause feature also works in most VoIP contact lists — check your service's help documentation for the exact symbol to use (usually a comma, but sometimes a semicolon or other character).

If you're calling from a business phone system, your phone may have a dedicated extension button or a soft key that lets you enter extensions differently. Check your phone's manual or ask your IT department if there's a faster way to dial extensions on your specific system.

When you don't know the extension

If you don't have the extension, call the main number and listen to the menu. Most systems offer an option to search by name, reach a department, or speak to a receptionist. Press 0 or wait for a prompt that says "for other options" or "to speak to someone." A receptionist can transfer you or give you the correct extension.

You can also search online for the person's direct extension. Many companies list employee extensions on their website, in a directory, or on LinkedIn. If the company is large, try searching "[company name] [person's name] extension" in a search engine.

Frequently Asked Questions

How long should I wait before entering an extension?

Wait until the greeting or menu finishes and you hear a tone or prompt. Usually this takes 3 to 5 seconds. If you're not sure, wait a bit longer — most systems will prompt you to enter an extension if they're ready for it.

What does the # or * key do after an extension?

Some phone systems use # or * to confirm that you've finished entering the extension. If you enter an extension and nothing happens, try pressing # to submit it. Check the company's voicemail greeting or website to see if they mention this.

Can I save an extension in my phone's contacts?

Yes. Add a comma (or your phone's pause symbol) after the main number, then type the extension. When you call that contact, the phone will pause and dial the extension automatically. Test it once to make sure the timing works.

What if the extension is for a department, not a person?

Dial it the same way. The system will route you to that department's line or voicemail. If you need a specific person in that department, you may need to ask when someone answers, or call back and use a menu option to reach them by name.

Why does my extension sometimes not work?

The system may have timed out, the extension may have changed, or you may have entered it too quickly. Hang up and try again. If it still doesn't work after two attempts, call the main number and ask a receptionist for the correct extension or routing.